52.A.had known B.have known C.know D.knew 查看更多

 

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________, I would have told you.

[  ]

A.If I knew it

B.Had I known it

C.If I know it

D.Did I know it

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If I ________ her telephone number, I would have called her.

[  ]

A.had known

B.has known

C.knew

D.know

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________ , I would have phoned you.  
A.If I knew it  B.Had I known it  C.If I know it   D.Did I know it

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I ________ him very well, but I haven’t seen him this week.

[  ]

A.have known

B.had known

C.know

D.knew

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I________him very well,but I haven’t seen him this week

[  ]

A.have known

B.had known

C.know

D.knew

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