单项选择题

A．He’s already helped her a lot.
B．She knows he’s very busy.
C．She doesn’t need any help.
D．He doesn’t know enough chemistry.
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单项选择题
A．Her grades are improved.B．Good grades are easy to get.C．Good grades take some sacrifice.D．Student life is supposed to be difficult.
A．Her grades are improved.
B．Good grades are easy to get.
C．Good grades take some sacrifice.
D．Student life is supposed to be difficult.
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