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语法题目请分析为什么不选A谢谢“HaveuseenDavidrecently?""No.Iguesshe()awayonvacation."A.musthasbeenB.mustbeC.mighthavebeenD.mayhasbeen
题目内容：
语法题目请分析为什么不选A谢谢
“Have u seen David recently?"
"No.I guess he ( )away on vacation."
A.must has been
B.must be
C.might have been
D.may has been优质解答
因为情态动词后面应跟动词原形,选C
“Have u seen David recently?"
"No.I guess he ( )away on vacation."
A.must has been
B.must be
C.might have been
D.may has been
优质解答
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