题目内容
She usually works ________ her computer ________ an hour before school.
[ ]
A.at, for
B.on, at
C.on, for
D.for, for
答案:C
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题目内容
She usually works ________ her computer ________ an hour before school.
A.at, for
B.on, at
C.on, for
D.for, for