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Look, so many people are running out of the station. I wonder what ________.
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A
is happened
B
was happening
C
is happening
D
had happened
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It’s said that the forest                    disappearing.
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A
is
B
am
C
are
D
was
He has a hard time          the problem.
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A
works out
B
working out
C
work out
D
works out
After I ______ my homework, I went out to an aquarium.
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A
was doing
B
did
C
does
D
would do
There   a strong wind in Shenyang tomorrow.
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A
have
B
will
C
will be
D
will have.
 Mr. Su _____ in Zhuyuan Middle School since 1998. He regards it his second home.
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A
lives
B
lived
C
has lived
D
will live