He may win the competition，________he is likely to get into the national team.
(2013·辽宁，34)
A．in which case B．in that case
C．in what case D．in whose case
Many countries are now setting up national parks________animals and plants can be protected. (2013·北京，27)
A．when B．which
C．whose D．where
When I arrived，Bryan took me to see the house ________ I would be staying.
(2013·大纲全国，24)
A．what B．when
C．where D．which
The president of the World Bank says he has a passion for China，________he remembers starting as early as his childhood. (2013·江苏，32)
A．where B．which
C．what D．when
The morning had been a disaster.My tooth was aching，and I’d been in an argument with a friend.Her words still hurt：“The trouble with you is that you won’t put yourself in my place.Can’t you see things from my point of view？” I shook my head stubbornly—and felt the ache in my tooth.I’d thought I could hold out till my dentist came back from holiday，but the pain was really unbearable.I started calling the dentists in the phone book，but no one could see me immediately.Finally，at about lunchtime，I got lucky.
“If you come by right now，” the receptionist said，“the dentist will fit you in.”
I took my purse and keys and rushed to my car.But suddenly I began to doubt about the dentist.What kind of dentist would be so eager to treat someone at such short notice？Why wasn’t he as busy as the others?
In the dentist’s office，I sat down and looked around.I saw nothing but the bare walls and I became even more worried.The assistant noticed my nervousness and placed her warm hand over my icecold one.
When I told her my fears，she laughed and said，“Don’t worry.The dentist is very good.”
“How long do I have to wait for him？” I asked impatiently.
“Come on，he is coming.Just lie down and relax.And enjoy the artwork，” the assistant said.
“The artwork？” I was puzzled.
The chair went back.Suddenly I smiled.There was a beautiful picture，right where I could enjoy it：on the ceiling.How considerate the dentist was！At that moment，I began to understand what my friend meant by her words.
What a relief！(2013·重庆，A)
1.Which of the following best describes the author’s feeling that morning?
A．Cheerful. B．Nervous.
C．Satisfied. D．Upset.
2.What made the author begin to doubt about the dentist?
A．The dentist’s agreeing to treat her at very short notice.
B．The dentist’s being as busy as the other dentists.
C．The surroundings of the dentist’s office.
D．The laughing assistant of the dentist.
3. Why did the author suddenly smile?
A．Because the dentist came at last.
B．Because she saw a picture on the ceiling.
C．Because she could relax in the chair.
D．Because the assistant kept comforting her.
4. What did the author learn from her experience most probably?
A．Strike while the iron is hot.
B．Have a good word for one’s friend.
C．Put oneself in other’s shoes.
D．A friend in need is a friend indeed.
Global warming is when the earth heats up，the temperature rises.It happens when greenhouse gases—carbon dioxide，water vapor，nitrous oxide(二氧化氮)，and methane(沼气) trap heat and light from the sun in the earth’s atmosphere，which increases the temperature.This is like when heat is trapped in a car.On a very hot day，the car gets hotter when it is out in the parking lot.This is because the heat and light from the sun can get into the car，by going through the windows，but it can’t get back out.Once the light is inside the car，it is trapped and the heat builds up，just like it does in the earth’s atmosphere.This is what the greenhouse effect does to the earth.The heat and light can get through the atmosphere，but it can’t get out.As a result，the temperature rises.
Sometimes the temperature can change in a way that helps us.The greenhouse effect makes the earth appropriate for people to live on.Without it，the earth would be freezing，or on the other hand it would be burning hot.We would not get the sun’s heat and light to make the night somewhat warm.During the day，especially during the summer，it would be burning because the sun would be up with no atmosphere to filter(过滤) it，so people，plants，and animals would be exposed to all the light and heat.
Although the greenhouse effect makes the earth able to have people living on it，if there gets to be too many gases，the earth can get unusually warmer，and many plants，animals，and people will die.They would die because there would be less food (plants like corn，wheat，and other vegetables and fruits)．This would happen because the plants would not be able to take in the heat.This would cause us to have less food to eat，but it would also limit the food that animals have.Gradually，people，plants，and animals would all die of hunger.
People are doing many things to try to stop global warming.One thing people are doing is carpooling.Carpooling is driving with someone to a place that you are both going to.This minimizes the amount of greenhouse gases put into the air by a car.
Another thing that people are doing is being more careful about leaving things turned on like the television，computer，and the lights.A lot of people are taking time away from the television，and instead，they are spending more time outdoors.This helps our planet out a lot.Now，more people are even riding buses，walking to school，and riding their bikes to lower the amount of greenhouse gases in the air.
Planting trees and recycling also help.If you recycle，less trash goes to the dump，and less trash gets burned.As a result，there are fewer greenhouse gases in our atmosphere.Although adults do many things to help stop global warming，kids can do just as much.
1.By the example given in Paragraph 1，the author wants to ________.
A．explain how greenhouse gases work
B．show his feeling in a car in hot summer
C．tell us cars are causes of greenhouse gases
D．say that there are greenhouse gases in every car
2.The underlined word “it” in Paragraph 2 refers to “________”．
A．light B．heat
C．temperature D．greenhouse effect
3.What is the main idea of Paragraph 3?
A．If there is greenhouse effect，all the plants will die.
B．Human beings are likely to disappear from the earth.
C．Crops can’t take the heat if there is greenhouse effect.
D．Although greenhouse effect is necessary，too much of it causes us to die.
4.What will the author most probably discuss in the paragraph that follows?
A．Why cars and buses pollute the air a lot.
B．What kids can do to help stop global warming.
C．What global warming is doing to the environment.
D．Who should be responsible for the environmental problems.
