题目内容
—They are in the dresser.
B. Where are the books?
C. Where's the book?
Do you know why different animals or pests have their special colors? Colors in them seem to be used mainly to protect themselves.
Some birds like eating locusts. but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops. When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.
If you study the animal life, you'll find the main use of coloring is protecting themselves. Bears, lions and other animals move quietly through forests. They cannot be seen by hunters. This is because they have the colors much like the tree.
Have you ever noticed an even more strange act? A kind of fish in the sea can send out a kind of very black liquid when it faces danger. While the liquid spread over, the enemies cannot find it. And it immediately swims away. So it has lived up to now though it isn't strong at all.
根据短文内容, 指出能完成所给句子或回答所提问题的最佳答案。
【小题1】From the passage we learn that locusts ___ .
| A．are small animals |
| B．are easily found by birds |
| C．are dangerous to their enemies |
| D．change their colors to protect themselves |
| A．have the colors much like the trees |
| B．move quickly |
| C．like brown and grey colors |
| D．live in forests |
| A．it is very big and strong |
| B．the liquid it sends out help it escape from its enemies |
| C．the liquid it sends out can kill its enemies |
| D．it swims faster than any other fish |
| A．The Change of Colors for Animals and Pests |
| B．Colors of Different Animals and Pests |
| C．The Main Use of Colors for Animals and Pests |
| D．Some Animals and Pests |
Like schools in China, American schools begin in September after a long summer vacation. The first term is from September to January and the second is from February to June. Usually American children begin to go to school when they are five years old. Most students are seventeen or eighteen years old when they finish high school.
But unlike middle school students in China, high school students in America take only four or five subjects each term. They usually go to the same classes every day and have homework for every class. After class they do all kinds of interesting things.
After high school, many students go to college. They may go to a small or a large one. They usually have to pay a lot for their higher education. So lots of students work after school to make money for their studies.
【小题1】In America, summer vacation lasts（持续）___________________.
| A．one month | B．two months |
| C．three months | D．more than three months |
| A．大学 | B．公司 | C．研究院 | D．高中 |
| A．want to see interesting things |
| B．have to help the other people |
| C．want to make more friends |
| D．have to get money for their studies |