― Has Jackson finished his work today? ― I have no idea, but he ______ it when I saw him this morning. 
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A
had done
B
would do
C
was doing
D
would have done
推荐题目
Fruit and vegetables          in areas_________ there is enough water.
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A
grows; that
B
are grow; where
C
growing; that
D
are grown; where
He is very sick. I insist that a doctor __________ immediately.
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A
has been sent for
B
sends for
C
will be sent for
D
be sent for
Hearing the news about Neil Armstrong's death,____.
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A
my heart missed a beat
B
my mind went empty
C
the newspaper shook with my hands
D
I was greatly shocked