He often _ the blackboard. ( )A...

2023-01-06

【题目】He often _____ the blackboard. (  )

A.clean B.cleaning C.cleans

【答案】C

【解析】

句意:他经常擦黑板。often是一般现在时的标志词,he是第三人称单数,动词clean用单三式cleans,故选C。