阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
The truth 1.________ trees are vital to our life is not a secret. They provide us with food, wood and most 2.________ (important), oxygen. Now there is one more thing we can add to this list—blocking out harmful bacteria from water.
The discovery 3.________ (make) by a team consisting4.________ scientists from the Massachusetts Institute of Technology (MIT) and high school students 5.________ were seeking a natural water filter—one that would help communities in developing countries that do not have access to modern water filter systems.
The 6.________ (research), led by Professor Rohit Karnik, decided to turn to trees for help 7.________ they could allow liquid to flow through, while blocking out air bubbles.
They began by cutting 1.5-inch-wide sections of tree bark from the branches of a white pine tree. The people related then tested the wood’s filtering ability by pouring water containing red dye particles of different sizes through. 8.________ their amazement, they found that it was effective in trapping all the articles. 9.________ (encourage), the team conducted 10.________ experiment, this time with water that contained bacteria. Sure enough, the sapwood held back 99% of the bacteria, allowing only 1% to flow through.
阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
It was a very cold evening. The old man’s beard was almost icy. He was waiting for a ________ across the river. The wait seemed ________. The old man sat on the ground waiting for quite a long time.
________, he saw several horsemen coming. He watched them silently and let the first one pass by without even asking. Another passed by, and then another, till the last rider came near the old man. The old man caught the rider’s ________ and said, “Sir, would you ________ giving me a ride to the other side?”
________ his horse, the rider replied, “Of course not.” But it was so cold that the old man’s body was almost ________. He could not get ________the ground. The horseman helped the old man onto his horse. He took the old man not just across the river, ________ to the old man’s home.
As they ________ the old man’s house, the horseman asked, “Sir, you let several other riders pass by without even asking. Then I ________ and you asked me for a ride at once. Why? ________ I had said ‘no’ and left you there?”
The old man looked the rider straight in the eye, and said, “I looked ________ the eyes of the other riders. I quickly saw that they didn’t ________. It would be ________ even asking them for a ride. But in your eye I saw ________. I knew that you would help me.”
The words ________ the rider deeply. “Thank you for what you’ve said,” he told the old man. “I hope I will never leave others ________ simply because I’m busy, and every American citizen does ________ in my heart.”
With that, Thomas Jefferson, the third president of the US, turned his horse around and made his ________ back to the White House.
1.A. helpB. rideC. tripD. drive
2.A. usefulB. boringC. fortunateD. endless
3.A. GraduallyB. FinallyC. SadlyD. Surprisingly
4.A. eyesB. handC. backD. face
5.A. likeB. thinkC. offerD. mind
6.A. SpeedingB. RidingC. StoppingD. Leaving
7.A. shockedB. stuckC. frozenD. injured
8.A. downB. onC. inD. off
9.A. onlyB. butC. soD. then
10.A. nearedB. visitedC. passedD. missed
11.A. came onB. came inC. came upD. came out
12.A. Even ifB. What ifC. As ifD. Only if
13.A. outB. forC. intoD. up
14.A. tryB. waitC. askD. care
15.A. uselessB. riskyC. dangerousD. foolish
16.A. braveryB. loyaltyC. ambitionD. kindness
17.A. attractedB. comfortedC. touchedD. occupied
18.A. aloneB. outC. awayD. over
19.A. desireB. liveC. countD. advance
20.A. choiceB. livingC. mindD. way
Sometimes willpower is a lot like the television remote control hard to find just when you want it most. ________ But there are ways to increase your willpower.
Don’t try to change your economic situation, win a promotion and lose weight all on the same morning. Set one clear, specific goal and make a realistic plan to achieve it. Extra willpower sometimes requires extra energy, so don’t spread yourself too thin. ________
Whatever your goal is, don’t spread it overnight. ________ If you are trying to kick a coffee habit, start by replacing your morning cup of coffee with a glass of water, instead of promising never to drink coffee again. Congratulate yourself on the small achievements. These successes help your willpower grow.
________ Ask friends, family or colleagues for assistance and tell them exactly how they can help. If your credit card bills have risen, for instance, let friends know that you are cutting back on expenses. Suggest having a common dinner instead of meeting at an expensive restaurant. Find support group or organization related to your goal and attend their meetings. You can get valuable advice, understanding and information.
If possible, change your environment to encourage positive behavior. Want to get in shape? Keep a set of workout clothes in your office as a reminder to stop by the gym on the way home. Quitting smoking?
A. Real success takes time.
B. Focus on one goal at a time.
C. Change your environment to change your life.
D. Improve your willpower by a support network.
E. Changing your behavior requires more than willpower.
F. Avoid bars or restaurants where you might be attracted to light up.
G. Breaking a bad habit or forming a new and healthy one can be difficult.
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多于选项。
A
How to Love Your Parents
Even if you think that your parents are mean-spirited at times, loving your parents is a normal and fulfilling part of life. You love them for the fact that they created you, raised you, and are in part, a source of who you are. Here are some ways to love your parents.
___ ___ A gentle "good morning" and "I love you" will warm a coldest heart．
Remember that they brought you into this world．Without your parents, we might still wander at an unknown corner in an unknown world.
Respect them more and cherish these moments．You can use these moments to learn from them, preparing yourself for when you're off on your own．It's OK to get angry but angry actions don't help you or your parents． Act calmly, cool off, write down your feelings, or talk to a friend. ___ ____
Obey their requests． It will make your attitude better and earn you more respect from them．It may seem like you are going through hell when you don't get what you want or you have to clean．However, you had better remember they keep a roof over your head when it's cold, raining, snowing, or too hot．Understand that parents are human beings and make mistakes．____ _____ Since you can forgive your friends, why not forgive your parents?
Keep company with them．Do things with your parents like watching TV, or go
somewhere with them．_______ Listen to their old stories and learn from them． You will find they are your teachers in this way or another．
Some people simply may not be able to love their parents．__ ___ Seek help if you are being abused (虐待)in any way. Parents do not have a right to harm you.
A. Forgiveness is the key.
B. Tell them you love them every morning.
C. Parents will in turn express their love to you.
D. After this, share your feelings with your parents.
E. Anyway, spend as much time with them as you can.
F. Please remember parents are as important as friends.
G. There can be realistic reasons for this, family violence for example.
While astronauts in space get to do many exciting things, they miss out on ordinary things that we all take for granted—being able to walk on firm ground, hanging out with family and digging into a slice of hot steaming pizza. Though not much can be done about the first two things, there may soon be a solution to the third one, thanks to this cool 3-D pizza printer!
About a year ago, NASA offered $125,000 to Anjan Contractor, a 3-D technology expert, to build a device that would allow astronauts to make pizza on demand. The mechanical engineer promised that his invention would produce pies in large quantities that looked, tasted and even smelled like pizza made in common ovens.
Late last year, the engineer presented a video of his first prototype (原型) that begins by creating a single slice of dough (面团) that is cooked and printed at the same time. Then comes the tomato “sauce”—a mix of tomato powder, oil and water and finally, a protein slice that resembles cheese. While the video doesn’t show the baking process, the inventor says that once the pizza is printed, it can be ready to be consumed (消耗) in 7 seconds.
While the pie in the video looks delicious enough to attract any pizza lover, Anjan Contractor is far from ready for astronauts. That’s because he still has to find a solution to make the food container in the printer last for 30 years. Though that may sound unrealistic, actually it is not. Anjan Contractor believes that the only way that is possible is that the water is removed from all the ingredients and then they are reduced to the powder form. This, as you can imagine, will not be so easy. But, while the printer may not be ready for space, it certainly looks ready enough for people on earth. Hopefully, NASA and Contractor will consider selling it to those not fortunate enough to go to Mars!
1.Why does the author mention the things that astronauts in space cannot do?
A. To ask us not to take common things for granted.
B. To show they live a difficult life there.
C. To show their life is boring in space.
D. To introduce the topic of the text.
2.NASA offered $125,000 to Anjan Contractor mainly to ________.
A. create some new type of 3-D printer
B. attract more companies to work for NASA
C. help astronauts in space enjoy fresh pizza one day
D. produce pizza in large quantities to earn great profits
3.The biggest challenge that Anjan Contractor is faced with now is probably that ________.
A. he has no money left to go on with his research
B. the pizza doesn’t seem appetizing to pizza lovers
C. he has no way to make pizza that can last for thirty years
D. he cannot make the food container last for decades
4.What’s the best title of the passage?
A. NASA is trying its best to help astronauts eat better.
B. Astronauts may soon be able to enjoy steaming hot pizza.
C. NASA is working on making pizza for common people.
D. A 3-D pizza printer has been used to make pizza.
I never thought I would have a life-changing experience at Wal-Mart.
Although my thoughts were only on speed, the checkout line I was standing in wasn't moving as quickly as I wanted, and I glanced toward the cashier. There stood a man in his seventies, wearing glasses and a nice smile. I thought, well, he's an old guy! For the next few minutes I watched him. He greeted every customer before scanning the items. Sure, his words were the usual, “How's it going？” But he did something different—he actually listened to people. Then he would respond to what they had said and engage them in a brief conversation.
I thought it was odd. I had grown accustomed to people asking me how I was doing simply out of robotic conversational habit. After a while, you don't give any thought to the question and just mumble something back. I could say, “I just found out I have six months to live，” and someone would reply, “Have a great day！” But that wasn't the end.
He gave them the change, walked around the counter, and extended his right hand in an act of friendship. He looked the customers in the eyes. “I surely want to thank you for shopping here today，” he told them. “You have a great day. Bye-bye.”
The looks on the faces of the customers were priceless. There were smiles and some sheepish grins. All had been touched by his simple gesture—and in a place they never expected. They would gather their things and walk out, smiling.
Of course, he did the same to me and I got to know his name, Marty.
Who was that guy? It was as if Sam Walton had come back from the dead and invaded this old guy's body. I had never walked away from that shop feeling like that.
1.According to the writer, when common people ask you “How's it going？”, ________.
A．they don't really care what you may answer
B．they are just practicing their conversation ability
C．they are inquiring about your private information
D．they don't expect to hear any negative answers
2.What was most customers' reaction to Marty's behaviors?
A．They thought it priceless. B．They were in some way moved.
C．They thought it awful and odd. D．They felt somewhat offended.
3.What can we infer about Sam Walton?
A．He might be Marty's father or grandfather.
B．He might be friendly and devoted to Wal-Mart.
C．He might have died while working in the market.
D．He might have come back from the dead once before.
4.What does the writer intend to express through the text?
A．Our everyday life is always full of surprises.
B．Most customers enjoy being treated this way.
C．Being different is a good way of doing business.
D．A little positive action can make a big difference.
