问题描述：
说明理由
1.No wonder you caught a cold.You ______ have gone out last night without a coat.
A.shouldn't B.mustn't C.couldn't D.mightn't,
2.The smart criminal always always paid _____ cash,so the police could not track him down.
A.on B.by C.in D.for
1.No wonder you caught a cold.You ______ have gone out last night without a coat.
A.shouldn't B.mustn't C.couldn't D.mightn't,
2.The smart criminal always always paid _____ cash,so the police could not track him down.
A.on B.by C.in D.for
问题解答：
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