单项选择题

The doctor asked the child' s parents ______.

A．what is the problem
B．what was the problem
C．what the problem was
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单项选择题
Each one of us ______ a nice pencil-box.
A．have
B．has
C．is having
单项选择题
The wise old man knew why the boy was unhappy.
A．Right.
B．Wrong.
C．Doesn't say.
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