单项选择题

I suppose you're not serious, ______

A．don't I
B．do I
C．arc you
D．are not you
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单项选择题
I enjoy playing basketball and then ______ .
A．taking a bath
B．to take a bath
C．take a bath
D．took a bath
单项选择题
You'd better ______ the doctor earlier.
A．to see
B．seeing
C．having seen
D．go to see
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