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。
167.Not only ____ this machine but ____ it。A。 can he runcan he repair B。 can he runhe can repair
C。 he can runhe can repair D。 he can runcan he repair
解析：该题答案为B，在not onlybut (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 didnt leave until twelve改为It was not until twelve that he left。
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。
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Im，相当于while Im doing my home work。如：While playing guitar， he is singing。
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 mustnt ___B_____ until he comes back。 A。 be away B。 leave C。 be left
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。
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。
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 couldnt walk on。(A)A.sothat B.tooto C.verythat D.veryto
I thought he___D____to see his mother if he time。
A.will gohas B.will go will have C.would go would have D.would go had
175。 Today the forests have almost gone。 People must ___C____ down too many trees。
A。 stop from cutting B。 stop to cut C。 be stopped from cutting D。 be stopped to cut