68. I failed in the final examination last term and only then _____the importance of studies.

A. I realized　 B. I had realized　 C. had I realized　　 D. did I realize

67. The old couple have been married for 40 years and never once _____with each other.

A．they had quarreled　 　　　　　　 B．they have quarreled

C．have they quarreled　　　　　　　 D．had they quarreled

66. ---Did Linda see the traffic accident?

---No, no sooner _____impossible now does seem possible.　

A. had she gone　　 B. she had gone　　 C. has she gone　　　 D. she has gone　　　　　

65. Never in my wildest dreams _____these people are living in such poor conditions．

A．I could imagine　 B．could I imagine　 C．I couldn’t imagine　 D．couldn’t I imagine　

64. Had I known her name，___________ .

A.or does she know mine　　　　　　　 B.and where does she live

C.she would come here　　　　　　　　 D.I would have invited her

63. _______，I have never seen anyone who's as capable as John.

A. As long as I have traveled　　　　 B. Now that I have traveled so much

C. Much as I have traveled　　　　　 D. As I have traveled so much

62. So difficult _____it to live in an English-speaking country that I determined to learn English well.　

A. I have felt　 B. have I felt　　　 C. I did feel　 D. did I feel

61. So ____ that no fish can live in it.　　

A. the lake is shallow　　　　　　　 B. shallow the lake is　　

C. shallow is the lake　　　　　　　 D. is the lake shallow

60. ---David has made great progress recently.

　---_____,　 and　 ______.

A. So he has; so you have　　　　　　 B. So he has; so have you

C. So has he; so have you　　　　　　 D. So has he; so you have

59. Only in this way _____ progress in your English.

A. you make　　　　　　　　　　　　　　 B. can you make　　

C. you be able to make　　　　　　　 　　D. will you able to make