Mr. Green, a famous writer, ____________ our school next week.
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A
visited
B
visits
C
was visiting
D
will visit
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By the time I got to the cinema,the movie _______ for ten minutes.
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A
had begun
B
had been on
C
has started
D
has been on
-Why does the river smell terrible? -Because the water_______.
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A
was polluted
B
has been polluted
C
will be polluted
D
has polluted