who is helping the teacher()the blackboard.A.cleaning B.clean C.cleans D.is cleaning介四偶滴作业,急…………
问题描述：
who is helping the teacher()the blackboard.A.cleaning B.clean C.cleans D.is cleaning
介四偶滴作业,急…………
答
B.clean
答
B.clean
翻译：谁在帮老师擦黑板？
help sb do sth
答
help sb do sth
B
答
B
help sb do sth 帮某人做某事
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