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 crocodile’s 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