My mother was sitting by the window. She was ________ tired ________ do the housework.
A. so; that B. too; to C. such; that D. enou
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h; to
My mother was sitting by the window. She was ________ tired ________ do the housework.
A. so; that B. too; to C. such; that D. enough; to
B so...that和such...that两个结构中，that后跟从句，故可排除A、C两项；enough修饰形容词或副词时要后置，故不符合此处语境，可排除D项；too...to...意为“太……而不能……”，to后跟动词原形，故选B。