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    15．Maria has to baby-sit． That's she can't come out with us. A．why B．how C． when D． what 【查看更多】

     

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    Maria has to baby-sit．That’s＿＿＿ she can’t come out with us．

    A. why         B. how            C. when             D. what

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    Maria has to baby-sit．That’s　　 she can’t come out with us．

    　 A．how　　　　 B．why　　　 C ．when　　　 D．what

     

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