题目内容
17. A. receive B. received C. to receive D. receiving
18. A. are travelling B. were travelling C. travel D. was traveling
19. A. losing B.lose C.lost D. to lose
20. A. learnt B. had learnt C. have learnt D. are learning
21. A. used to B. to used to C. get used to D. to get used to
22. A. to B. 一 C. are D. is
23. A. on B. to C. what D. that
24. A. 一 B. All C. Every D.Any
25. A. l had B. l' d had C. I'd have D. have
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