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综合英语（二）(00795) > 正文内容
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.
did not know
B.
not knowing
C.
had not known
D.
having not known
正确答案是B
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