174. You must make your new house clean and safe __C_____you move in. A.because　 B.when　 C.before　 D.until

I was_______tired_______I couldn't walk on.(A)A.so…that　　 B.too…to　 C.very…that　　 D.very…to

I thought he___D____to see his mother if he　 time.

A.will go…has　　 B.will go …will have C.would go …would have　 D.would go …had

173. His　 father　 ______ the　 Party　 since　 1978.A.　 joined　　 B.　 has joined　　 C.　 was in　　 D.　 has　 been　 in　　 现在完成时中，非延续性动词不能与for和since引导的表示一段时间的状语连用，通常是用相应的延续性动词来代替。故11的正确答案依次为：D.

172. -These　 farmers　 have　 been　 to　 the　 United　 States.　 -Really ？ When _____　 there ？

　A. will　 they　 go　 B.　 did　 they　 go　 C.　 do　 they　 go　 D.　 have　 they　 gone现在完成时与一般过去时容易混淆，就是因为它们所表示的动作都发生在过去，但二者又有区别：一般过去时表示过去某个时间发生的事、存在的状态或经常发生的动作，说话的侧重点在于陈述一件过去的事情，与现在没有关系；现在完成时表示与现在有关系的发生在过去的动作，它不与表示过去的时间状语(如yesterday ， last　 week ， a　 moment　 ago等)连用。故9的正确答案为B.

171. The bus ____C__ on the road for 2 hours so far.　　 A. has stopped　 B. stopped　 C. has been

Are you __A___ the jacket these days?　　　 A. wearing　　 B. putting on　 C. dressing　 D. on

He __C______ foe 2 hours.　 A. got up　 B.　 has got up　　 C. has been up

You mustn't ___B_____ until he comes back.　　　 A. be away　 B. leave　 C. be left

170. While ____my homework, I heard a cry for help.A do B did C doing D having done 　解析：该题答案为C。该空处省略了I'm,相当于while I'm doing my home work.如：While playing guitar, he is singing.

169. There are a lot of students ____ in the class room.A talk　 B talking　 C talked　 D to talk 　解析：该题正确答案为B。 There be句型为倒装句，可换为A lot of students are talking in the class room. 又如：There is a lot of noise heard out in the street.

167.Not only ____ this machine but ____ it.　A. can he run……can he repair　　 B. can he run……he can repair 　C. he can run……he can repair　 D. he can run……can he repair 　解析：该题答案为B，在not only……but (also)句型中，只有but前面的部分倒装，but后面仍是正常语序。 168.____ that he went to sleep.A It was until midnight　　　　　 B That was until midnight 　C It was not until midnight　 D That was not until midnight解析：该题答案为C。强调until结构时，要将否定词not移到until前。又如：He didn't leave until twelve 改为It was not until twelve that he left.

165. The chemical works _______　 where my father has worked for thirty years in 1949. 　A. was built B. were built C. is built D. are built 解析：该题答案为A。works形式上是复数，意思上是单数，因此谓语动词用单数，类似的还有news, maths, politics, physics. 166.They each _______　 a copy of the new physics.　A. have B. has C. having D. gets 　解析：该题答案为A。They each不等于each of …, each of 这个词组作主语谓语用单数如each of the students hands in their homework，而they each作主语，谓语要随each前面的词来变化。

162. _______　 I accept the gift or refuse it is none of your business.　A. If 　B. Whether 　C. Even if 　D. No matter when解析：该题答案为B。whether可以和or连用，if不可以，此外if一般仅用于宾语从句。 163. The way _______　 these comrades look at problems is wrong.　A. where 　B. in that 　C.X 　D. with which解析：该题答案为C，先行词是way，定语从句中用that或 in which来引导或不填。 164. ____a long time since I saw you last time.A．It was 　B. It is 　C. It had been 　D. It can be 　解析：该题答案为B，It is +时间数+ since引导的从句是一个句型，意为"从…时候以来过了多久了。"

161.He hardly writes to you, _______ ?A. doesn't he 　B. does he 　C. do they 　D. has he 　解析：该题答案为B，hardly否定副词，反问部分要用肯定形式。