35. Only in this way _______ the bad habit -- smoking.

　　 A. you can get rid of　 B. can you get rid of　　 C. you will get rid of　 D. can get rid of

34. -- Do you like the new books?

　 -- They are pretty ________ useful.

　　 A. more　　　　　 　B. instead of　　　　　 C. not only　　　　　 D. rather than

33. -- Why was the road crowded?

　 -- The traffic was _________ by a car accident.

　　 A. held back　　　 B. held out　　　　　 C. held to　　　　　　 D. held up

32. It _________ a long time since I _________ Tom at my uncle's and I don't know where he these months.

　　 A. is; saw; has been　　　　　　　　　　 B. was; saw; has been

　　 C. was; had seen; was　　　　　　　　　　 D. is; had seen; has gone

31. ________ you understand the rule, you will have no further difficulty.

　　 A. While　　　　 B. Once　　　 C. Though　 　　D. Unless

30. -- I wonder why Mr Green looks worded today.

　 -- I'm not sure, but he ________ a small accident driving here.

　　 A. could have　　　 B. might have　　 C. might have had　　　　 D. must have had