—Look! Someone ________ the floor.—Well, it wasn't me. I went shopping just now.
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A
had swept
B
has swept
C
was sweeping
D
is sweeping
推荐题目
They ______Hong Kong twice.  
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A
have gone to
B
have been to
C
have been in
D
have gone in
Years of fighting have ______ the area ______.
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A
remained; in ruins
B
left; in ruins
C
remained; in ruin
D
left; in ruin
In the last few years thousands of films ________ all over the world.
#63768
A
have produced
B
have been produced
C
are producing
D
are being produced