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34．While the boy down the street, the UFO landed． A．had walked B．was walking C．has walked D．is walking 【查看更多】

 

題目列表(包括答案和解析)

While the boy              down the street, the UFO landed．

A．had walked          B．was walking         C．has walked          D．is walking

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While the boy ________ down the street, the UFO landed．

[　　]

A．had walked

B．was walking

C．has walked

D．is walking

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While the boy ________ down the street, the UFO landed．

[　　]
A．

had walked

B．

was walking

C．

has walked

D．

is walking

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