◎ 题干
When he ________ home, he saw his mother           the room.
A.got back; cleanB.got on; cleaning
C.got at; cleanD.got back; cleaning
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“When he ________ home, he saw his mother the room.A.got back; cleanB.got on; cleaningC.got at; cleanD.got back; cleaning…”主要考查了你对  【实义动词的单数第三人称形式】【实义动词】【动词短语】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。