_____ she is at home ,I'm not sure A,May be. B Maybe. C. May. D. Must

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_____ she is at home ,I'm not sure A,May be. B Maybe. C. May. D. Must
_____ she is at home ,I'm not sure A,May be. B Maybe. C. May. D. Must

_____ she is at home ,I'm not sure A,May be. B Maybe. C. May. D. Must
B 也许
分析:A 不能放在主语前; C与D后接动词原形,即不能是IS
加油!不明白再问!