单项选择题

One must keep calm in () time of danger.

A.a
B.the
C.that
D./

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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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