As ______ clear from his manners, he is a teacher.A、beingB、isC、to beD、beenB本

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问题 As ______ clear from his manners, he is a teacher.

选项 A、being
B、is
C、to be
D、been

答案 B

解析 本题考核as从句。题意为:从他的举止便可以明显地看出,它是一名教师。as意为“如,照(某种事实或情况)”,在本句中为关系代词,指代第二个分句,as代替整个句子作主语时,谓语动词通常必须用单数。类似的句子还有:As has been known,Mr.Smith has made great contributions to the friendship between China and U.S.A..众所周知,史密斯先生对中美两国的友谊作出了巨大的贡献。As is reported in today’s
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