15．Your mother         have fallen asleep．You were making so much noise so late in the yard then!（　�。�
A．mustn'tB．can'tC．mightn'tD．shouldn't

分析 你媽媽不可能睡著了，那時候你在院子里搞出那么多的噪音！

解答 答案：B
解析：A：禁止；B：不可能；C：可能沒；D：不應(yīng)該．根據(jù)句意"你媽媽不可能睡著了，那時候你在院子里搞出那么多的噪音！"及所給選項分析可知，本題答案為B選項；其余選項均不符合題意．

點評 本題考查情態(tài)動詞的辨析，做此類題目時一定要清楚各個選項的含義及用法，再結(jié)合句意選出最終答案．

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