30.-----He has been working . -----No wonder he looks very tired now. A.Sooner or later B.Day and night C.Now and then D.Here and there 查看更多

 

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-----He has been working     .

-----No wonder he looks very tired now. 

A.sooner or later    B.day and night   C.now and then   D.here and there

 

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-He has been working ________.

-No wonder he looks very tired now.

[  ]

A.sooner or later

B.day and night

C.now and then

D.here and there

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