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Why can’t some birds easily catch locusts（蝗虫）? 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 autumn comes, locusts change to the same brown color as crops have. Some other insects with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives in the day and appear only at night.
If you study the animal life, you’ll find the main use of coloring is to protect themselves. Bears, lions and other animals can’t be easily seen by hunters. This is because they have the colors much like the trees.
Have you ever noticed an even more strange thing? A kind of fish in the sea can send out black liquid when it faces danger. While the liquid spreads over, its enemies can’t find it. And it quickly swims away. So it has lived up to now though it is not strong at all.
【小题1】 From the article we learn that locusts .
| A．are dangerous to their enemies | B．are easily found by birds |
| C．change their colors to protect themselves | D．are small animals |
| A．They have to move quietly. |
| B．They hide themselves in the day and appear at night. |
| C．They have the colors much like their enemies. |
| D．They run away quickly. |
| A．they live in forests | B．they like brown and grey colors |
| C．they move quietly | D．they have the colors similar to the trees |
| A．气体 | B．固体 | C．液体 | D．水蒸气 |
| A．The Main Use of Colors for Animals and Insects |
| B．Colors of Different Animals and Insects |
| C．The Change of Colors for Animals and Insects |
| D．The Change of Different Animals and Plants |
补全对话,选择合适的句子,使对话完整
A：Do you like the snake?
B: Yes,? 1 ?.What about you?
A: I don't like it.? 2 ??
B: No，? 3 ?.It comes from Australia.
A: ? 4 ??
B: No, it doesn't. It likes meat.
A: Does it eat grass?
B: No, it doesn't, but it lives ? 5 ?.
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A．Does it like water? |
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B．I do |
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C．it doesn't |
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D．in grassland |
E. Does it come from the Arctic?
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完形填空
There is a big zoo in our city. There are lots of 1 in it. The elephant is very big. We all like to see it, 2 it is very cute. The tiger comes from the Changbai Mountain of 3 .It walks about in the cage(笼子).The lion’s room is 4 the tiger’s room. The panda in the zoo is a little shy. It is very interesting. It eats 5 .The giraffe is very 6 .It is very funny. It comes from Africa. We all 7 animals because they are 8 friends. Some boys and girls, men and women often come to the zoo and see 9 on 10 .
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