We have been told that under no circumstances we may use the telephone in the office for personal affairs.
A) have been told
B) no
C) we may
D) for
解析：
应改为may we。本题考查倒装句的用法。后面that引导的宾语从句有否定词under no circumstances“在任何情况下都不”，所以从句主谓要倒装。
When Daddy will come back, I am going to tell him everything about your poor performance at school.
A) will come back
B) am going
C) everything
D) at
解析：
应改为comes back。考查时态：主将从现。
We wish that you didn't have such a lot of work,otherwise you would have enjoyed the party.
A) wish
B) didn't have
C) work
D) would have enjoyed
正确答案：
B
解析：
wish后跟的宾语从句中，表示对过去的一种愿望要用过去完成时。
We solved the problem by using a computer rather than to do it all by hand.
A) by using
B) than
C) to do
D) by hand
解析：
应改为doing。本题考查比较状语从句中的平行结构。前后比较的成分的结构要一致，前面用by using a computer，所以rather than后面也要用现在分词。
When a water is heated, it changes into vapor.
A) a water
B) is heated
C) changes
D) into vapor
解析：
不可数名词。water是不可数名词，不能用a修饰。
Tom's father, as well as his mother, ask him to stay in New York for a few more days.
A) as well as
B) ask
C) to stay
D) a few more
正确答案：
B
解析：
主谓一致。as well as是插入语，真正的主语是Tom's father，所以谓语动词用第三人称单数形式asks。
We have come to the conclusion when this summer will be much hotter than before.
A) have come
B) when
C) will be
D) hotter than
解析：
when之后的部分是同位语从句，用来解释conclusion的内容，所以应改为that.句意为：我们已经得出了结论，这个夏天将比之前的更热。
We think that impossible for them to work out those math problems within such a short time.
A) that
B) for
C) to work out
D) such
解析：
固定搭配it's impossible for sb. to do sth．，表示对某人来说不可能做某事。
Tom and I are looking forward to be seeing you, so don't disappoint us!
A) are
B) be seeing
C) so
D) disappoint
解析：
改为seeing。 look forward to中的to为介词，后面加动名词。
We see lightning before we hear the thunder because sound travels more slowly than light is.
A) before we
B) because
C) more slowly
D) light is
解析：
比较级前面是实义动词travel，后面应该用does代替。
No sooner had Professor Smith begun to speak when some noise arose from the audience.
A) had
B) begun
C) when
D) arose
解析：
应改为than。固定结构。no sooner...than...一……就……。
People appreciate to have worked with him because he has a good sense of humor.
A) to have worked
B) because
C) a good sense
D) humor
解析：
应改为working。考查非谓语动词作宾语的搭配：appreciate加v.-ing。译文：我们很（珍惜）乐意与他共事的（机会），因为他很幽默。
No matter whatever happens, we're determined to do our best and make the experiment a success.
A) whatever happens
B) do our best
C) make
D) a success
正确答案：
A
解析：
应改为what happens。no matter what = whatever，不管什么。
Over the past 20 years, the Internet has helped change our world in either way or another for the better.
A) the past
B) helped change
C) either
D) for the better
解析：
应改为one。固定用法：one...another一个...另一个。在过去的20年中，网络已经帮助我们的世界用一种或另一种更好的方式发生了改变。
Of the two lectures, the first was by far the best one, partly because the person who delivered it had such a pleasant voice.
A) the first
B) the best
C) it
D) such a
解析：
改为the better。丙者比较用比较级，三者或以上用最高级。
Neither he nor I are going to attend the lecture this afternoon.
A) he
B) I
C) are going
D) the
解析：
neither．．．nor．.．连接并列主语时谓语动词要与距它最近的主语一致。即与nor后的主语一致。因此改are为am.
Now a lot of young people in the village, unlike his parents, choose to make a living in cities.
A) a lot of
B) in
C) his
D) to make a living
解析：
应改为their。指代前面的a lot of young people，许多年轻人是复数，所以要用their这个第三人称复数所有格限定词。
Paul suggested that they meet in the front of the school gate at one o'clock Friday afternoon.
A) they meet
B) in the front
C) at
D) Friday
解析：
in the front of表示“在……前部”；本句表示“在……前面”，应该用in front of.
Nobody believed that his excuse for being late was why his car broke down on his way to work.
A) believed
B) excuse for
C) why
D) broke down
解析：
表语从句。excuse和why不应同时出现，应该用that。
Only when he apologizes for his rudeness I will speak to him again.
A) when
B) apologizes
C) I will
D) him
解析：
应改为will I。only+状语提前，主句用部分倒装，将助动词提前。