问题

are used all the time and unless yourecognize when an idiom is being used, what you read or hear ______ can easilybe misunderstood
A:blame;on;are to be blamed
B:blame;for;are to blame
C:blame;on;are to blame
D:had been doing
B:blame;for;are to blame
C:blame;on;are to blame
D:had been doing
正确答案是: