中文谷MillieandKittyaregoodfriends,theyoften
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问题详情：
Millie and Kitty are good friends, they often _________ each other _________study.
A、helping; with B、help; to
C、helping; to D、help; with
【回答】
D
知识点：动词和动词短语
题型：选择题
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