35. - How could you make such a silly mistake?

- I’m sorry. I ______ it before I handed in the paper.

A. should check　　　　　　　　　　　　　　　　　　　　　　　　　　　 B. could check　　　　　　　　　　

C. must have checked 　　　　　　　　　　　　　　　　　　　 D. ought to have checked　　　

34. Jim couldn’t afford to buy the present for his wife, for five pounds was ______ he had on him.

A. all that　　　　　　　　　　　 B. that　　　　　　　　　　　　　 C. all what 　　　　　　　　　 D. what that

33. What’s the use of keeping the secret ______ everyone has already known it?

A. as though　 　　　　　　　 B. now that　　　　　　　　　 C. before long　　　　　　　 D. in case　

32. Under no circumstances ______ allowed to enter the lab without permission.

A. you are　　 　　　　　　　　　　 B. you will be　　　　　　　　 C. are you　 　　　　　　　 D. have you