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_______ for the breakdown of the school computer network,Alice was in low spirits.

A. Blaming　B. Blamed?

C. To blame D. To be blamed?

______for the breakdown of the school computer network,Alice was in low spirits.

A.Blaming                           B.Blamed

C.To blame                          D.To be blamed

______ for the breakdown of the school computer network, Alice was in low spirits.

A. Blaming         B. Blamed C. To blame        D. To be blamed