单项选择题

There (are) two kinds of (computers) in this country, both of (them) are widely (used) today.

A．are
B．computers
C．them
D．used
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单项选择题
She was (angry), went (out), and (slamming) the door (behind) her.
A．angry
B．out
C．slamming
D．behind
单项选择题
You (had better) (return to) your dormitory and (to enjoy) the company of your roommates instead of (wasting) time with me.
A．had better
B．return to
C．to enjoy
D．wasting
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