单项选择题

The man standing by the window is my friend, Phil. He is expert ______operating a computer.

A．for
B．to
C．at
D．with
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单项选择题
I have seen the picture dozens of times, and it’s always as new to me ______ I had never seen it before.
A．as
B．as if
C．though
D．like
单项选择题
It was not until she took off her dark glasses ______ I realized she was a famous film star.
A．that
B．so that
C．before
D．when
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