She is fatter now. She _____too much. A are eating B must have eatenFather came ______ Sally was slipping on the floor. A. while B. just as C. when D. as

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She is fatter now. She _____too much. A are eating B must have eaten
Father came ______ Sally was slipping on the floor. A. while B. just as C. when D. as

选B,表示推测,她一定过去吃了不少.