He wants to pass the English exam,so he works hard ____ it.A.for B.as C.at D.with

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He wants to pass the English exam,so he works hard ____ it.A.for B.as C.at D.with

He wants to pass the English exam,so he works hard ____ it.A.for B.as C.at D.with
He wants to pass the English exam,so he works hard ____ it.
A.for B.as C.at D.with

He wants to pass the English exam,so he works hard ____ it.A.for B.as C.at D.with
选C
work at sth 致力于某事

A

C

D

我怎么觉得应该用on阿

C