22.The mother did not know to blame for the broken glass as it happened while she was out. A.who B.when C.how D.what 查看更多

 

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The mother did not 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 did not 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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he mother did not 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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