The mother didn't know who _____ for broken glass.

The mother didn't know who _____ for broken glass.

A.will blame

B.to blame

C.blamed

D.blames

答案及解析： B

to blame意为“该受责备，应负责任”以主动表被动。句中who是to blame的宾语，即疑问词who+不定式to blame连用。