单项选择 适中0.65 引用5 组卷704
Students should do everything they can ________ their study.
A.improve | B.to improve | C.improving | D.improved |
2010·四川攀枝花·中考真题
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________ to take care of animals, he volunteered ________ at the animal hospital on weekends.
A.Learning; to work | B.To learn; to work | C.Learning; working | D.To learn; working |
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