The number of the students in our school ____ rising since 2006.
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A
is
B
has been
C
are
D
have been
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A poet and artist with high fame ______ coming to speak to us about Chinese literature and painting tomorrow afternoon.
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A
is
B
are
C
was
D
were
He’s got himself into a dangerous situation _____ he is likely to lose control over the plane.
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A
where
B
which
C
while
D
why