单项选择题

He ______ be in the classroom because he was seen playing football on the play- ground.

A．mustn't
B．can't
C．may not
D．isn't able to
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单项选择题
______ send your motorcycle to be repaired You'd better not drive it any more.
A．Wily
B．Why not
C．Why don't
D．Why didn't
单项选择题
— I hear Johnson was badly injured in the accident. —______, let's go and see him.
A．What's more
B．If so
C．Where possible
D．When necessary
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