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the room, a flower pot was seen by the side of the window. [ ] A.Having enteredB

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the room, a flower pot was seen by the side of the window. [ ] A.Having enteredB

________ the room, a flower pot was seen by the side of the window.

[]

A.Having enteredB.On enteringC.When enteringD.When I entered

试题答案

答案:D

解析:

导解:主句的主语不能进行这一动作.