I cannot get my son to understand that extra time _______ now will pay off in t

题干

I cannot get my son to understand that extra time _______ now will pay off in the future.

A．spent studying	B．spent to study
C．spending to study	D．to spend studying

上一题下一题 0.64难度单项选择更新时间:2014-12-02 07:40:10

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