25. –I’m sorry but I must be going off now.　 --Ok, __________. A. So long　　　 B. Walk slowly　　　 C. Be careful　　　 D. Take your time

24. Can you think of some cases ___ drivers obviously knew the traffic rules but didn’t obey them? 　A. why　　　　　 　B. where　　　　　　 　C. as　　　　　　 　D. which

23. It is such a difficult problem _______ no one can work out. A. as　　 　　　　　B. that　　　　 　 C. so　 　　　　D. thus

22. –Well, where did you spend your night that day?　 --At __________. A. where it is called Grand Hotel　　　 　B. what is called Grand Hotel C. which is called Grand Hotel　　　　 　D. that is called Grand Hotel

21. –Have you seen the film?　 --Yes. I __________ it three times when I was in Tokyo. A. saw　　　 　　　B. had seen　　　　 　C. have seen　　　 D. was seeing

20. Failure is the mother of success. ______ your courage and you’ll succeed. 　 A. Keep off　　　　 B. Keep out　　　　　 　C. Keep up　　　 D. Keep on

19. When she came several days later, she found that all things still ______ where she had ________ them. A. lay; laid　　　 B. laid; laid　　　 C. lay; lain　　　　 D. lying; laid