the river is dangerous.you ___ swim in it .A.can't B.mustn't C.couldn't D.needn't
the river is dangerous.you ___ swim in it .A.can't B.mustn't C.couldn't D.needn't
英語人氣：724 ℃時間：2019-12-07 07:15:32
優(yōu)質(zhì)解答
選擇B,因?yàn)閙ustn't表示的是禁止,河是危險的,所以是禁止,表示命令
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