It's high time that you ________ even harder at your lessons as the exam is around the corner.
#86899
A
work
B
will work
C
worked
D
have to work
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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