单项选择题

Did you know ______ with the bike

A． what did he do
B． he did what
C． what he did
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单项选择题
I hope my kids ______ give you any trouble.
A． not
B． not to
C． won't
单项选择题
Neither John nor I ______ able to solve the problem.
A． are
B． is
C． am
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