My mother, （）whether anyone would come home to help her, had to prepare the supper all by herself.
A.正确答案Bdid not know
B.not knowing
C.had not known
D.having not known
My mother, （）whether anyone would come home to help her, had to prepare the supper all by herself.
My mother, （）whether anyone would come home to help her, had to prepare the supper all by herself.
A.正确答案Bdid not know
B.not knowing
C.had not known
D.having not known
