Ⅰ 完形填空。
A large number of animals use their colours to blend into the environment. Colours in them seem to be used mainly to 1 themselves.
Some birds like eating locusts (蝗虫), but birds cannot catch them 2. Why? It is because locusts change their colours together 3 the change of the colours of crops. When crops are green, locusts look green. But as the harvest time comes, locusts change to the 4 brown colour as crops have. Some other pests (害虫) with different colours from plants are easily 5 and eaten by birds. So they have to hide themselves in the 6 and come out only at night.
Bears, lions and other animals move quietly 7 forests. They cannot be easily seen by hunters. This is 8 they have the colours much like the trees.
Have you ever noticed an even 9 act of animals? A kind of animal in the sea can send out a kind of black liquid (液体) when it 10 danger. While the liquid spreads over (散开), its enemies (敌人) cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.
1. A. keep B. protect C. enjoy
2. A. really B. clearly C. easily
3. A. with B. to C. from
4. A. deep B. same C. light
5. A. fed B. heard C. found
6. A. evening B. daytime C. past
7. A. through B. on C. across
8. A. why B. because C. so
9. A. smaller B. slower C. stranger
10. A. faces B. comes C. saves

1. B
2. C
3. A
4. B
5. C
6. B
7. A
8. B
9. C
10. A

1. Why don’t camels need to eat very often?

2. The polar bear spends about ____ of the time eating food.

3. Which of the following is TRUE according to the passage?

【解析】：
这是一道英语阅读理解题，主要考查学生对文章信息的理解和提取能力。文章主要介绍了动物如何适应不同环境，特别是骆驼和北极熊的适应方式。
1. 第一题问为什么骆驼不需要经常吃东西，这需要从文章中找到关于骆驼适应干旱环境的描述，特别是它们如何储存脂肪和不需要经常进食的部分。
2. 第二题问北极熊花费多少时间在吃东西上，这需要从文章中找到关于北极熊生活习性的描述，特别是它们时间分配的部分。
3. 第三题是一个选择题，要求选出文章中描述正确的一项，这需要学生对文章整体内容有较好的理解，并能够准确提取关键信息。
【答案】：
1. B
原文中提到骆驼的适应方式包括“don’t need to drink or eat often”，即它们不需要经常进食或饮水，这是它们对干旱环境的适应。因此，选项B“Because of their adaptation to the dry weather.”是正确的。
2. A
原文中提到北极熊“about 67% of the time for sleep; about 30% for the swim and the walk; eat at the other time”，即它们67%的时间在睡觉，30%的时间在游泳和走路，其余时间在吃东西。因此，北极熊吃东西的时间占3%，选项A是正确的。
3. C
原文中提到“Adaptation changes an animal’s body and the way it lives.”，即适应会改变动物的身体和生活方式。因此，选项C“Adaptation may change an animal’s living habits.”是正确的。