题目内容：
6. 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
7. How can pests with different colors from plants keep out of danger?
A. They run away quickly.
B. They have the colors much like their enemies.
C. They hide themselves by day and appear at night.
D. They have to move quietly.
8. Bears and lions can keep safe because _________.
A. they have the colors much like the trees
B. they move quietly
C. they like brown and gray colors
D. they live in forests
9. Why can the kind of fish live up to now?
A. Because it is very and strong.
B. Because the liquid it sends out can help it escape from its enemies.
C. Because the liquid it sends out can kill its enemies.
D. Because it swims faster than any other fish.
10. Which is the best title for this passage?
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
参考答案：