31. Jack _________ the test again; in that case, his father will be very disappointed.

A. must have failed　　 B. might fail　　 C. should fail　　 D. could have failed

30. Unexpected difficulties ____in the course of their experiment.

A. arises　　　 B. were arising　　　　 C. arose　　　　 D. were arisen

29. All the supplies _____after the battle.

A. ran out　　　 B. was run out　　　 C .has run out　　　 D. ran out of

28. Obama’s success in presidential election proves that the color of one's skin shouldn't be a ______ to success.

A. barrier 　　　　　　　　　 B. behavior　　　　　　　　　　　　 C. battle　　　　　　　　　　　　　　　 D. bunch

27._______________her so upset last night?

A. What do you think making　　 B. What do you think made

C. Do you think what made　　　 D. Do you think what had made

26. -Was ___ Bill, ___ played basketball very well, ____ helped the blind man cross the road?

-Yes, of course. He is always ready to help others.

A. it; that; who　　 B. this; who; that　 　　　　 C. which; that; that　 　 D. it; who; that

25. A normal young child gains great pleasure when___ he(she) does pleases his(her) mother.

A. that 　　　　B. if　　　　 C. as　　　　 D. what

24. He watched her, _________.

A. fascinating　　 B. fascinated　　 C. being fascinated　　 D. having fascinated

23. This stranger is familiar _________this area.

A. to 　　　　　B. for　　　　 C. with　　　　 D. in

22. A troop _____fine weapons are marching towards the front.

A .are equipped with　　 B. to be equipped with　　 C. equipped with　　 D. being equipped with