单项选择题

She remembered several occasions in the past ______ she had experienced a similar feeling.

A．which
B．before
C．that
D．when
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单项选择题
For the success of the project, the company should ______ the most of the opportunities at hand.
A．obtain
B．grasp
C．catch
D．make
单项选择题
The Clarks haven't decided yet which hotel______
A．to stay
B．is to stay
C．to stay at
D．is for staying
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