单项选择题

Something must be done. There will not be enough space even to stand () the earth.

A.in
B.on
C.in on
D.on in

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单项选择题
As gas is getting more and more expensive, many people are () public transportation.

A.looking for
B.setting up
C.turning to
D.changing into
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
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