单项选择题

The theory is of great importance ______ the hotter a body is, the more energy it radiates.

A．that
B．when
C．which
D．what
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单项选择题
I couldn't understand why he pretended ______ in the bookstore.
A．to see me not
B．not to see me
C．not see me
D．to see not me
单项选择题
He might have been killed ______ the arrival of the police.
A．even if
B．if only
C．but for
D．as if
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