单项选择题

He talks as if he ______ everything.

A．know
B．knew
C．had known
D．has known
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单项选择题
I prefer singing ______ drawing.
A．to
B．for
C．than
D．that
单项选择题
It was not until she got on the bus ______ she remembered she had left her key sat home.
A．when
B．which
C．that
D．where
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