单项选择题
When you entering college, your education is not very serious business.
A．对
B．错
When you entering college, your education is not very serious business.
A．对
B．错
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A.defining
B.having
C.carrying
D.doing
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Eventually, they gave up the project to build a bridge over the river because of
Eventually, they gave up the project to build a bridge over the river because of
A.excessively
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D.efficiently