21.-Why were you late for such an important concert?

　　 -The plane arrived at the airport after a ______ of three hours.

　 　A.delay　　　　　 B.rest　　　　　　 C.tour　　　　　 D.request

20.______ the thief, Mr Jison’s niece _____ him a blow on the head.

　　 A.Following, dare not give　　　　　 B.Followed, dare not give

　　 C.Following, didn’t dare give　　　　 D.Followed, dared not to give

19.They delayed _____ the sports meet until next month.

　　 A.to hold　　　　 B.hold　　　　　　 C.held　　　　　 D.holding

18.There is no doubt _____ the football team will win this game.

　　 A.whether　　　　 B.that　　　　　　 C.which　　　　 D.as

17.He made several business ____ America last year and learned a lot.

　　 A.visit　　　　　 B.visits　　　　　　 C.visit to　　　　 D.visits to

16.Recently I bought an ancient vase, _____ was very reasonable.

　　 A.which price　　 B.the price of which C.its price　　 D.the price of whose

15.I’ll never forget the days _____ I stayed in your beautiful country.

　　 A.on which　　　　 B.in which　　　 C.of which　　 D.ofr which

14.We are _____ to go off for Shanghai next week.

　　 A.maybe　　　　　 B.possibly　　　 C.probably　　 D.likely

13.It’s none of our business. We should _______ their quarrels.

　　　　 A.take part in　　　 B.keep out of　　 C.keep off　　 D.join in

12.-What are you going to do for the holiday? –I _____ staying at home for a good rest.

　　　　 A.would like　　　 B.feel like　　　 C.should like　 D.would prefer