单项选择题

Perhaps it will be a long while（）Donald comes back from New York. Don't wait for him.

A. when
B. that
C. since
D.before

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单项选择题
It is reported that the United States uses（）energy as the whole of Europe.

A. as twice
B. twice much
C. twice much as
D. twice as much
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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