We have been told that under no circumstances we may use the telephone in the office for personal affairs.
A) have been told
C) we may
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
We wish that you didn't have such a lot of work,otherwise you would have enjoyed the party.
B) didn't have
D) would have enjoyed
We solved the problem by using a computer rather than to do it all by hand.
A) by using
C) to do
D) by hand
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
D) into vapor
Tom's father, as well as his mother, ask him to stay in New York for a few more days.
A) as well as
C) to stay
D) a few more
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
C) will be
D) hotter than
We think that impossible for them to work out those math problems within such a short time.
C) to work out
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!
B) be seeing
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
C) more slowly
D) light is
No sooner had Professor Smith begun to speak when some noise arose from the audience.
People appreciate to have worked with him because he has a good sense of humor.
A) to have worked
C) a good sense
No matter whatever happens, we're determined to do our best and make the experiment a success.
A) whatever happens
B) do our best
D) a success
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
D) for the better
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
D) such a
Neither he nor I are going to attend the lecture this afternoon.
C) are going
Now a lot of young people in the village, unlike his parents, choose to make a living in cities.
A) a lot of
D) to make a living
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
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.
B) excuse for
D) broke down
Only when he apologizes for his rudeness I will speak to him again.
C) I will