The TV sets made by our factory sell best, but 10 years ago no one could have guessed the place in the markets that they _______.
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A
were having
B
had had
C
were to have
D
had
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.If _____,the experiment will be successful.
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A
carefully doing
B
it done carefully
C
carefully done
D
doing carefully
.It is no use ______ after you know your failure.
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A
cry
B
to cry
C
crying
D
cried