单项选择题

Many types of rock are __ from volcanoes as solid, fragmentary material.

A．ejected
B．injected
C．propelled
D．flung
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单项选择题
How is it______ your roommate's request and yours are identical
A．if
B．so
C．what
D．that
单项选择题
What a lovely party! It's worth ______ all my life.
A．remembering
B．to remember
C．to be remembered
D．being remembered
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