Question: Why is it so hard for some peo...

根据汉语完成句子。(请将答案写在答题卡对应题号的横线上。)

1.老师讲英式英语和美式英语没有太大区别。

It ________ ________ ________ ________ a difference whether a teacher speaks British or American English.   

2.每天早晨,他带着一个圆形木板爬到拐弯处.

Every morning he climbs up to the bend _______a large circular board ________ ________ ________.

3.但经常他们只是从他们身边驶过,把人体交通标志看作理所当然的事.

But often they just pass by, ________ the ________ ________ ________ for granted

4.到19世纪50年代，它每年能卖出100万册，这使它成为迄今为止最受欢迎的教科书之一。

________ the 1850s, it ________ ________ one million copies a year, ________ it one of the most  popular school books ever.

5.应工人们的要求，老板向遇难者的家属道了歉。

________ ________ to the workers’ ________,the boss ________ an apology to the relatives of  victims.

用方框内单词的适当形式填空。(请将答案写在答题卡对应题号的横线上。)

1.His speech was so ________ that few people could understand it.

2.More than 300 police were sent to _______ the traffic.

3.There are many ________ of English in the world.

4.He is not ________ to be a doctor.

5.Now think of some more questions to ask people _______for these jobs.

6.For people doing this job , common sense is _________ to be more important than computer skills.

7.She is looking for a ________ assistant with good organized skills.

8.His disease is ________ to his bad habit of diet.

9.The piano my father bought for me ________ up too much room..

10.Running Marathons requires a high level of ________ fitness.

Have you ever wondered why there are so many skin colors in the world? Do you know why people living in particular areas usually have a certain color? Biology and history are the two reasons for this.

Skin contains something called melanin, which determines a person’s skin color. The more melanin a person has, the darker his or her skin will be. The amount of and the production of melanin are controlled by genetics, but can be affected by other things, such as sunlight. If a person lives in a place with less sunlight, a person’s body will produce less melanin, making the skin lighter.

Skin color is also affected by another source ---- vitamin D. humans all need vitamin D to build bones. People can get it by eating foods such as fish and milk, or from sunlight, so sunlight absorbed by melanin cannot be used for vitamin D production. Therefore, a dark—skinned person will produce less vitamin D than a light—skinned person when they received the same amount of sunlight.

The connection between vitamin D production and skin color is clear when we look at evolution. The earliest humans lived in Africa, their dark skin produced less vitamin D because of their dark skin. As a result, their skin made less melanin, so they could get enough sunlight to produce vitamin D. their skin gradually got lighter and they lost hair. Now, people living in areas with strong sunlight like Africa, have darker skin, while people living in other areas have lighter skin. The exception to this is the Inuit, who live in a place with little sunlight, but have dark skin because they eat a lot of fish and have enough vitamin D.

Evolution has given us a rainbow of skin colors. Humans have always had melanin to determine our skin color. What has changed through history is the environment where we have lived. This has in turn changed our melanin production, and eventually, skin color.

Honey from the African forest is not only a kind of natural sugar, it is also delicious. Most people and many animals like eating it. However, the only way for them to get that honey is to find a wild bees' nest and take the honey from it. Often, these nests are high up in trees, and it is difficult to find them. In parts of Africa, though, people and animals looking for honey have a strange and unexpected helper - a little bird called a honey guide.

The honey guide does not actually like honey, but it does like the wax in the beehives (蜂房). The little bird cannot reach this wax, which is deep inside the bees' nest. So, when it finds a suitable nest, it looks for someone to help it. The honey guide gives a loud cry that attracts the attention of both passing animals and people. Once it has their attention, it flies through the forest, waiting from time to time for the curious animal or person as it leads them to the nest. When they finally arrive at the nest, the follower reaches in to get at the delicious honey as the bird patiently waits and watches. Some of the honey and the wax always falls to the ground, and this is when the honey guide takes its share.

Scientists do not know why the honey guide likes eating the wax, but it is very determined(坚定的) in its efforts to get it. The birds seem to be able to smell wax from a long distance away. They will quickly arrive whenever a beekeeper is taking honey from his beehives, and will even enter churches when beeswax candles are being lit.

1.Why is it difficult to find a wild bees' nest?

2.What do the words "the follower" in Paragraph 2 refer to?

3.The honey guide is special in the way              .

4.What can be the best title for the text?

On a hill 600 feet above the surrounding land, we watch the lines of rain move across the scene, the moon rise over the hills, and the stars appear in the sky. The views invite a long look from a comfortable chair in front of the wooden house.

Every window in our wooden house has a view, and the forest and lakes seldom look the same as the hour before. Each look reminds us where we are.

There is space for our three boys to play outside, to shoot arrows, collect tree seeds, build earth houses and climb trees.

Our kids have learned the names of the trees, and with the names have come familiarity and appreciation. As they tell all who show even a passing interest, maple（枫树）makes the best fighting sticks and white pines are the best climbing trees.

The air is clean and fresh. The water from the well has a pleasant taste, and it is perhaps the healthiest water our kids will ever drink. Though they have one glass a day of juice and the rest is water, they never say anything against that.

The seasons change just outside the door. We watch the maples turn every shade of yellow and red in the fall and note the poplars’（杨树）putting out the first green leaves of spring. The rainbow smelt fills the local steam as the ice gradually disappears, and the wood frogs start to sing in pools after being frozen for the winter. A family of birds rules our skies and flies over the lake.

1.What can be learned from Paragraph 2?

2.By mentioning the names of the trees, the author aims to show that           .

3.What does the underlined sentence in the last paragraph mean?

4.What is the main purpose of the author writing the text?