In the past 5 years a great deal of money _____ improving the environment of the school.
#103617
A
is spent
B
has been spent
C
was spent
D
had been spent
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——Is there any possible way to help them get rid of such a bad habit? ——To tell the truth, it’s very hard. But we_______ on this problem.
#103283
A
worked
B
had worked
C
are working
D
had been working
It is said that the old pot ____under the earth for about 1000 years by the time it was discovered.
#102218
A
had buried
B
had been buried
C
buried
D
were buried
--Have the police found the parents of the baby found by the road? ---Not yet. His identity ______.
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A
would be found out
B
has been found out
C
is being found out
D
had been found out
Mr. Johnson insisted that he _____ his debts, but nobody believed him.
#103363
A
pay
B
pays
C
paid
D
had paid