单项选择题

—I'm very tired. —We really should stop ______ and go to bed.

A．to study
B．from studying
C．studying
D．of studying
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单项选择题
You never told us why you were late for the last meeting, ______
A．weren't you
B．didn't you
C．had you
D．did you
单项选择题
Lily has made great progress. She listens to the teacher ______ than before.
A．much carefully
B．as careful
C．more carefully
D．careful
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