In the last few years thousands of films ________ all over the world.
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A
have produced
B
have been produced
C
are producing
D
are being produced
推荐题目
 The house is dirty because it ________ since they moved out.
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A
doesn't clean
B
isn't cleaned
C
hasn't cleaned
D
hasn't been cleaned
Because of the bad weather, my mother ____ and lay in bed. She ______ for a week. 
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A
has been ill; was ill
B
fell ill; has fallen ill
C
fell ill; has been ill
D
fell ill; is ill
 Kate  ________    on her new novel, which is supposed to come out next month.
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A
was working
B
had worked
C
will be working
D
has been working
I wonder why Jenny ____ us recently. We should have heard from her by now. 
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A
hasn’t written
B
doesn’t write
C
won’t write
D
hadn’t written