单项选择题

The degree （）you maintain your mental health may depend on certain simple environmental factors.

A．which
B．to which
C．that
D．to that

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单项选择题

It is worth （）that even the most complex scientific ideas can eventually affect one's daily life.

A．to remember
B．remember
C．remembered
D．remembering

单项选择题

After （）seemed to be an endless wait, it was finally his turn to have the interview.

A．that
B．when
C．what
D．which

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