单项选择题

You______return the book now. You can keep it till next week if you want to.

A．do not have to
B．haven't
C．can't
D．mustn't
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单项选择题
Do you know
A．what time the movie starts
B．the movie what time starts
C．the time to start the movie
D．what time starts the movie
单项选择题
The new plan exists only______paper, and it won't work______practice.
A．on... in
B．on... on
C．in... in
D．in... on
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