UC知道He wants to pass the English exam.So he works hard ____ it.
来源：百度知道 编辑：UC知道 时间：2024/05/13 00:26:01
理由，谢谢
用at
work hard at 努力学习……[固定词组]
for 为... 表示目的
on表示在这方面下功夫 for表目的
支持这个
on表示在这方面下功夫 for表目的
on/for
for 原因: for在这里的意思就是 : 对学习勤奋!
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He wants to pass the English exam.So he works hard ____ it.
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