Crocodiles (鳄鱼) 1 their eggs and leave them under leaves or sand. Baby crocodiles use their teeth 2 their way out of the shells (壳).
Crocodiles only live 3 it is hot. They are found in Australia 4 America. They spend most of 5 time lying around in the rivers. The crocodiles long tail 6 when the animal is swimming. It is an excellent weapon(武器). It 7 be used to strike (打击) the 8 . One blow will knock 9 a man or even a big animal at 10 . The crocodile has a hard neck. It cannot turn its 11 from side to side and so it can 12 see in front of itself. The crocodile has its teeth 13 by the crocodile bird. For its food this bird takes the bits in the crocodiles mouth. This helps the crocodile a lot 14 it cannot move its tongue up and down. 15 its terrible teeth it catches its food. The food may be a fish, an animal, or even a careless man.
1. A. lay B. lie C. lain D. lying
2. A. to feel B. to turn C. to break D. to rush
3. A. when B. while C. where D. if
4. A. as B. and C. but D. so
5. A. its B. hot C. their D. cold
6. A. is used B. for help C. very useful D. be helpful
7. A. should B. can C. need D. must
8. A. friend B. enemy C. student D. family
9. A. soon B. far C. up D. down
10. A. most B. best C. once D. worst
11. A. tail B. head C. eyes D. body
12. A. not only B. still C. even D. only
13. A. pulled B. cleaned C. taken D. brushed
14. A. because B. so C. if D. whether
15. A. Under B. Between C. For D. With
名师点评
这篇文章主要讲述了鳄鱼的生活习性，你也许会感叹：大自然太神奇了!如果鳄鱼没有长长的尾巴，它拿什么作武器?如果鳄鱼能转动它的舌头，那鳄鱼鸟怎么生存?
答案简析在下一页：
1. A。lay eggs产卵，下蛋lay-laid-laid。lie躺，位于lie-lay-lain，说谎lie-lied-lied。
2. C。小鳄鱼破壳而出。
3. C。鳄鱼住在热的地方。where引导地点状语。
4. B。
5. C。与前面的They对应。
6. A。被用来。其他的选项有语法错误。
7. B。can 表示一种能力，意为它的尾巴能用来攻击。
8. B。敌人。
9. D。knock down 撞倒。
10. C。at most最多，at the best处于最佳状态，at once立刻,马上。根据意思应为立刻把一个大的动物击倒。
11. B。根据上文脖子硬，那当然是头不能转动，而不可能是尾巴，眼睛或身体。
12. D。而头不能转动，就意味着只能看前方的东西。
13. B。have sth. done 让某事被做。Have its teeth cleaned 让鳄鱼鸟给它清洗牙齿。
14. A。根据上下文之间的联系，这里是陈述为什么对它有帮助的原因，因此用because。
15. D。固定搭配，意为用牙齿。