单项选择题

The theory is of great importance _______ the hotter a boby is, the more energy it radiates.

A．that
B．when
C．which
D．what
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单项选择题
Without a passport, leaving the country is ______.
A．in question
B．without question
C．out of the question
D．out of question
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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