In the past twelve months the research members ______ the effectiveness of many materials in a home building.
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A
had studied
B
would study
C
studied
D
have studied
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They each other for 5 years.
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A
have been in love with
B
have fallen in love with
C
are in love with
D
fell in love with
Had it been possible I would have gone to the movies, but I ________________ busy.
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A
had been
B
am
C
was
D
would be
John had to have his car repaired in a garage because it ______ seriously.
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A
damaged
B
was being damaged
C
had damaged
D
had been damaged
Then I made a complaint to the manager and the problem soon．
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A
was solved
B
had been solved
C
would solve
D
has been solved
—I’m sure Andrew will win the first prize in the final.—I think so. He _________ for it for months.
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A
was preparing
B
is preparing
C
has been preparing
D
had been preparing