39.The mother didn’t know was to blame for the broken glass as it happened while she was out. A.who B.whoever C.how D.what 查看更多

 

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The mother didn’t know how to blame for the broken glass as it happened while she was out.

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The mother didn't know        is to blame for the broken glass as it happened while she was out.
[     ]
A. who      
B. when        
C. how      
D. what

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The mother didn’t know ________ is to blame for the broken glass as it happened while she was out.

[  ]

A.who

B.when

C.how

D.what

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The mother didn’t know_________to blame for the broken glass as it happened while she was out.?

A.who                   B.when                 C.how                   D.what?

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The mother didn’t know ____to blame for the broken glass as it happened while she was out.

    A. who    B. when    C. how     D. what

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