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23. I__________ you somewhere before, but your name has escaped me_________.

A. must see;for a moment　　　　　 B. must have seen; for a moment

C. must see;for the moment　　　 D. must have seen; for the moment

22. What worried the child most was _________ to visit his mother in the hospital.

A. his not allowing　　　　　　　 B. his not being allowed

C. his being not allowed　　　　 D.having not been allowed

21. -When__________ and visit our exhibition next month?

　 - When_______, I will let you know.

A. will he come; he will come 　B. will he come; he comes

C. does he come; he will come　 D. does he come; he comes

20. Michael __________ here to see you and he____________ a note on your desk.

A. has come; had left 　B. has been; has left

C. has come; left 　　D. has been; left

19. --How long ___________ each other before they__________ married?

--For about a year.

A. have they known;get　　　　　　 B. did they know; were going to get

C. do they know;are going to get　　 D. had they known; got

18. I really wonder__________ he has posted me many parcels___________ we didn’t work together.

17. It is a rule in his family that __________　 comes home earlier should cook the dinner for the family.

A. anybody　　　　 B. who　　　　 C. who that　　 D. whoever

16. The black horse is___________ of the pair.

A. the strongest　　　　　　　　　 B. the stronger

C. the strong　　　　　　　　　 　　D. quite strong

15. I coutdn't have got to the meeting on time____________ an earlier train.

A. if I had not caught　　　　　　　 B. unless I had caugh

C. if ! did not catch　　　　　　　 D. unless I caugh

13. Take a taxi,___________ you'll miss your train.

　A. in　　 B. during　　 C. throughout　　 D. within