(单选题)1: The millions of calculations involved, had they been done by hand, ___ all practical value by the time they were finished.
A: had lost
B: would lose
C: would have lost
D: should have lost


(单选题)2: ___ he has limited technical knowledge, the old worker has a lot of experience.
A: Since
B: Unless
C: As
D: Although


(单选题)3: It worried her a bit ___her hair was turning grey.
A: which
B: if
C: for
D: that


(单选题)4: The _______ work continued for more than a week but there was still no sign of the missing boy.
A: research
B: rescue
C: vessel
D: vast


(单选题)5: Sixty percent of the work___
A: have been done
B: had been done
C: has been done
D: has done


(单选题)6: His parents wouldn’t let him marry anyone ___ family was poor .
A: of whom
B: whom
C: of whose
D: whose


(单选题)7: You ___ him so closely; you should have kept your distance.
A: shouldn’t follow
B: mustn’t follow
C: couldn’t’ have been following
D: shouldn’t have been following


(单选题)8: ___ in the United States, St. Louis has now become the 24th largest city.
A: The fourth biggest city it was
B: Once the fourth biggest city
C: Being the fourth biggest city
D: It was once the fourth biggest city


(单选题)9: ___ we can’t get seems better than ___ we have.
A: What,what
B: What, that
C: That,that
D: That,what


(单选题)10: Eye contact is important because wrong contact may create a communication ___.
A: tragedy
B: vacuum
C: question
D: barrier


(单选题)11: What worried me most was ___ to go abroad alone.
A: my not allowing
B: having not allowed
C: my being not allowed
D: my not being allowed


(单选题)12: I think I was at school, ___ I was staying with friends during the vacation when I heard the news.
A: or else
B: and then
C: or so
D: even so


(单选题)13: There was a big hole in the road which ________ the traffic.
A: set back
B: held up
C: stood back
D: kept down


(单选题)14: She wrote a letter ___ black ink.
A: at
B: in
C: with
D: by


(单选题)15: The professor could hardly find sufficient grounds ___ his arguments in favour of the new theory.
A: to be based on
B: to base on
C: which to base on
D: on which to base


(单选题)16: He is a man ___ we can learn very much.
A: of whom
B: that
C: of who
D: from whom


(单选题)17: "What do you hear from your family?" "Oh, the news _______ pretty good. "
A: were
B: is
C: are
D: hadbeen


(单选题)18: He has resigned and will ___charge of his office today.
A: hand out
B: hand over
C: hand down
D: hand on


(单选题)19: In the dark street, there wasn’t a single person ___ she could turn for help.
A: that
B: who
C: from whom
D: to whom


(单选题)20: Robert is good at languages, ____ we all know.
A: because
B: for
C: as
D: since

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