根据下列句子及所给单词的首字母，写出各单词正确的完全形式(每空限填一词)。

57. The nurse a__________ my grandmother carefully while she was in hospital.

25. -Do remember not to touch the kettle full of boiling water, or you will get burned.

　 　-__________

A. What for? 　 　　　 　　　 B. Why not?　　　　　 　　　 C. Got it.　　　　 　　 　　　 D. Never mind.

24. If the rules of perspective had not been discovered, no one __________ able to paint such realistic pictures.

A. would be　　 　　　　　　 B. would have been　　 　　　 C. should be　　　　　 D. should have been

23. Nowadays many people prefer to have the booked goods _________ to their house rather than come to the shop for them.

A. to deliver　　 　　　 　　　 B. delivered　　　　　 　　　 C. be delivered　　　 　　 D. delivering

22. __________ students were absent from the meeting yesterday, which annoyed the school authority.

A. A great number of　　　　　　　 B. The number of　　　　　 C. A great deal of　 　　　 D. Many of

21. Most teachers try to give their lessons in a way __________ will impress students deeply.

　 A. in which　　　 　 　　　 B. by which　　　 　　 C. what　 　　 　　　　　 D. that