Was it 8 o’clock you heard someone at the door? A.when;knocking B.when;knock C.that;knocking D.that;knock 【查看更多】

 

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Was it 8 o’clock ________ you heard someone ________ at the door?

[　　]
A．

when; knocking

B．

when; knock

C．

that; knocking

D．

that; knock

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