1.Scientists say it (be)five or six years before it is possible to test this medicine on patients.
答案may be
2.—Can’t you stay a little longer?
—It’s getting late.I really (go) now.My daughter is home alone.
答案must go
3.Jane walked away from the discussion yesterday.Otherwise,she (say)something she would regret later.
答案might have said
4.You (feel) all the training a waste of time,but I’m a hundred percent sure later you’ll be grateful you did it.
答案may feel
5.—Isn’t that Ann’s husband over there?
—No,it (be) him,for he doesn’t wear glasses.
答案can’t be
6.What do you mean—there are only ten tickets?There (be) twelve.
答案should be
