Mary _____ a photo of Professor Smith while he was making a speech.
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A
took
B
takes
C
would take
D
has taken
推荐题目
Don’t talk here.  Grandparents ____.
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A
sleep
B
is sleeping
C
are sleeping
D
sleeping
— Have you finished your homework?— Not yet. But I _______ it in half an hour.
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A
finished
B
have finished
C
will finish
D
finish
. The train _____ for twenty minutes.
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A
left
B
has left
C
is leaving
D
has been away