题目内容

Mario used to ________ in the morning．

A.
practice swimming
B.
practicing swim
C.
practice swim
D.
practicing swimming

A
used to do sth．过去常做……，所以排出B、D项，practice后接动词的-ing形式．

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根据汉语提示完成句子，每空一词。
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    I ________ ________ ________ ________ of speaking in front of a group.
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3. 我开着卧室的灯睡觉。
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A. doesn't he
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C. isn't he
D. didn't he