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
Last time we learnt part of the text. Today let's go on ______ it.
A．to study
B．study
C．studying
单项选择题
I've never seen ______ beautiful girl.
A．such a
B．a such
C．so a
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