20．He said he would accept the job, so we have asked him to __________ his acceptance in writing．

　　　 A．confirm　 　　　　 B．prove　 　　　　　　 C．sign　 　　　　　　　 D．announce

19．When she was in trouble, I did what I could to help her．__________ my help, she wrote me a letter of thanks．

　　　 A．In honor of　 　　 B．In case of　 　　　 C．In terms of　 　　 D．In return for

18．With the evening drawing near, the guide __________ tourists and took them to the hotel．

　　　 A．rounded up　 　　 B．made up　 　　　　　 C．fed up　 　　　　　　 D．put up

17．Winners,according to the rules, will be offered a three-day holiday to Singapore, __________．

　　　 A．paying all expenses　 　　　　　　　　　　　　　 B．paid all expenses

　　　 C．to pay all expenses　 　　　　　　　　　　　　　 D．all expenses paid

16．Pleasant as they made it __________ , we felt tired after the long journey．

　　　 A．to travel　 　　　　　 B．traveling　 　　　　　 C．by traveling　 　　 D．for travel

15．As far as I know, quite a few creatures in this film are not real at all, and a lot of _________ happens is imaginary．

　　　 A．what　 　　　　　　　 B．which　 　　　　　　 C．that　 　　　　　　　　 D．where