单项选择题

There () means of knowing what is happening.

A．be
B．is
C．are
D．have

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单项选择题
She is () interested in physics. She often works at it until () into the night.

A．deep; deep
B．deep; deeply
C．deeply; deep
D．deeply; deeply
单项选择题
What shall we use for power when all the oil in the world has ()

A．given out
B．put out
C．held up
D．used up
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