单项选择题

Nowadays people are more concerned about the environment ______ they live.

A．what
B．which
C．when
D．where
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_______ which university to attend, the girl asked her teacher for advice.
A．Not knowing
B．Knowing not
C．Not known
D．Known not
单项选择题
______ you said at the meeting describes a bright future for the company.
A．When
B．How
C．What
D．That
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