161、 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。\"
162、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.
163、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。
164、 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。
165、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。
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.
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.
168、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. 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。
169、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.
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