1. i didn’t see your sister at the meeting. if she _______, she would have met my brother.
a. has come b. did come c. come d. had come
2. ---if he ______, he ______ that food.
---luckily he was sent to the hospital immediately.
a. was warned; would not take
b. had been warned; would not have taken
c. would be warned; had not taken
d. would have been warned; had not taken
3.--- the experiment has failed!
--- i suggest you ______ again.
a. try b. trying c. will try d. would try
4. i wish i ______ you yesterday.
a. seen b. did see c. had seen d. would
5. he _______ you more help, even though he was very busy.
a. might have given b. might give c. may have given d. may give资源难易程度:★★★★★★★★★★★★★★★
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