问题标题:
Weoftenhelptheoldman()?A.todosomecleaningB.cleanedC.cleansD.cleaning
问题描述:
Weoftenhelptheoldman()?A.todosomecleaningB.cleanedC.cleansD.cleaning
陈庆章回答:
helpsb(to)dosth
A符合,BCD都不是动词原形不符合题意.
应选A
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