四、首字母填空
KEY→P19
范畴:人与自然
主题:动物科普
体裁:说明文
难度:★★★
建议用时:8分钟
评价:/10
根据短文意思和首字母提示,写出一个完整正确的单词。
When it comes to rabbits, we always think of their long ears.
1. B do you know why they have such long ears? In fact, rabbits do not have any ways to fight with their enemies. The only way that they can protect themselves is to 2. f the enemies quickly and run away from them.

Rabbits have long ears for two main 3. r. With their long ears, rabbits can pick up sounds from up to three kilometres away. Most rabbits can move their ears in two 4. d directions. Each ear can turn up to 270 degrees. This 5. h them to hear the sounds from all directions. For example, when they hear the sounds of a wolf coming, the rabbits can 6. q run away.
Another reason why rabbits have long ears is that they need to control 7. t body temperature. Rabbits have many blood vessels in their long ears. When a rabbit feels 8. h, the blood vessels will become greater in size. This allows more blood to move to its ears. As air blows over, it 9. m the blood cool down. Then the cool blood moves to other parts of the body 10. s that it feels comfortable. However, less blood moves to the rabbit's ears on cold days. This helps to keep the heat.

首字母填空
兔子长着长长的耳朵,可以从 3000 米外的地方听到声音。每只耳朵可以转动 270 度,这有助于它们听到来自四面八方的声音。
1. But 前文提到人们总是想到兔子的长耳朵,后文问"你知道为什么它们有这样的长耳朵吗?",前后是转折关系。
2. find 兔子保护自己的唯一方法是快速发现敌人并逃离,to 后用动词原形。
3. reasons 根据后文"Another reason ..."可知,这里说的是兔子有长耳朵的两个主要原因。
4. different 此处表示兔子能将耳朵转向两个不同的方向,修饰 directions 用形容词 different。
5. helps 这(兔子耳朵能转 270 度)帮助它们听到来自各个方向的声音,This 作主语,是单数,故填 helps。
6. quickly 当兔子听到狼来了的声音,它们能快速地逃跑。修饰动词 run 用副词 quickly。
7. their 兔子有长耳朵的另一个原因是它们需要控制它们的体温。修饰 body temperature 用形容词性物主代词their。
8. hot 根据后文血管会变大,让更多血液流向耳朵等内容可知,当兔子感觉热的时候会这样。
9. makes 空气吹过,使血液冷却下来。it 作主语,故填makes。
10. so 然后冷却的血液流到身体的其他部位,这样它就会感觉舒服。so that 意为"以便,这样"。