It’s suggested that some activities        to celebrate the 30th anniversary of the Reform and Opening-up.
#87594
A
should hold
B
are held
C
be held
D
will be held
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—I visited China year. —That          interesting.
#87263
A
should have been
B
can be
C
must be
D
must have been
He knows it is high time that he ________ at once.
#87730
A
quits smoking
B
quitted smoking
C
should quit to smoke
D
quitted to smoke