__________you free now? I have some questions to ask you.
A. Will
B. Do
C. Are
D. Would
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How much time__________ we have to finish the test?
A. do
B. are
C. is
D. does
Could you tell me if there_________ plenty of rain in the east of China?
A. has
B. have
C. is
D. are
John_______come to see us tonight, but he isn’t very sure yet.
A. may
B. can
C. has to
D. must
Even the top student in our class can’t work out this problem, so it________ be very difficult.
A. may
B. must
C. can
D. need