27. That is a good book. You ____ it yesterday.
A. should have bought
B. bought
C. should buy
D. could buy
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28. This printer is of good quality.If it ____ breakdown within the first year, we would repair it at our expense.
A. would
B. should
C. could
D. might
29. They ____ two free tickets to Canada, otherwise they’d never have been able to afford to go.
A. had got
B. got
C. have got
D. get
30. It is high time we ____ home.
A. will go
B. would go
C. have gone
D. went
31. It is strange that you ____ say such a thing.
A. would
B. should
C. will
D. shall