Students should do everything they can _______ their study.

A. improve
B. to improve
C. improving
D. improved
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科目：初中英語 來源：2011-2012學(xué)年四川省江油市九年級中考適應(yīng)性考試（三）英語試卷（解析版） 題型：單項填空

Students should do everything they can __their study.

A. improve         B. to improve

C. improving       D. improved

 

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科目：初中英語 來源：四川省中考真題 題型：單選題

Students should do everything they can _______ their study.
[     ]
A. improve
B. to improve
C. improving
D. improved

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科目：初中英語 來源： 題型：

Students should do everything they can ________ their study.

A．improve           B．to improve             C．improving               D．improved

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