24.I searched for my wallet and it wasn't there. At first, I thought I 　　　　it at home. Then I remembered 　　　　　it out to pay for the taxi. 　A.must have left；to take 　B.may leave；taking 　C.might leave； to take 　D.could have left；taking

23.The thief drove as fast as he could to escape 　　　　by the police. 　A.to be caught　B.he caught 　C.being caught 　 D.catching

22.I delayed 　　　　　your letter because I had been away for a week. 　A.answer　　 B.answering　　 C.writing　　 D.to post

21.We advised them to take a rest, but they insisted　　　 　the work. 　A.finish　　 　 B.to finish　 　C.in finishing 　 D.on finishing

20.Anything worth 　　　　　is worthy of 　　　　　well. 　A.doing；being done 　B.doing；doing 　C.to be done；to be done 　D.to be done；being done

19.I don't see how I could possibly manage 　　　　　the work without 　　　　. 　A.finish；helping 　B.to finish；being helped 　C.finishing；helping 　D.finishing；being helped

18.I'd like to suggest 　　　　　the meeting till next week. 　A.to put off 　 B.putting off 　C.put off 　　 D.to be put off

17.He was afraid 　　　　　for being late. 　A.of seeing　 B.of being seen 　C.to be seen　 D.to have seen

16.Would you mind 　　　　　quiet for a moment? I'm trying 　　　　　a form. 　A.keeping；filling out 　B.to keep；to fill out 　C.keeping；to fill out 　D.to keep；filling out

15.We appreciate 　　　　　us to the ball. 　A.them to invite　 B.to invite 　C.their inviting　 D.being invited