—Listen!Helenissinginginthenextroom.—It__________beHelen.SheisinTian

发布时间:2020-08-14 13:57:25

—Listen ! Helen is singing in the next room.—It __________ be Helen. She is in Tianjin nowA.can’tB.mustn’tC.may notD.shouldn’t

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A解析根据后文的答语She is in Tianjin now,可作出推测,不可能是Helen,故选A
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