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457.The careless driver is ________ for the traffic accident that _______ yesterday.
A.to blame;happened
B.to blame;was happened
C.to be blamed;was happened
D.to be blamed;happened
458.Would you have called her up had it been possible?
Yes,but I _______ busy doing my homework.
A.was
B.am
C.had been
D.would be
