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Drivers _____drive after drinking.It's dangerous.A.mustn't B

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Drivers _____drive after drinking.It's dangerous.A.mustn't B.needn't
A,禁止
couldn't也行
再问： 答案为什么选择mustn't ?
再答： 你这题不是只有两个选项吗？
再问： A mustn’t B. needn’t C. wouldn’t D. couldn’t
再答： 1. mustn't表示“禁止/不允许”的意思。不能用于表示推测。语气比较强烈 如：You mustn't smoke here. 在这里你不许抽烟。 2. can't/couldn't表示推测时，表示“不可能...”的意思，语气也十分坚决，表示否定推测。 根据动作发生的时间，一般分为以下三种情况： 1）进行式（对正在发生的事情的否定推测）：can't be doing sth 如：It's already ten o'clock. My father can't be sleeping now. 2）完成式（对过去的动作的否定推测）：can't/couldn't have done sth 如：He is at schoool, so he can't/couldn't have stayed up last night. 3）一般式（对现在/将来情况的否定推测）：can't do sth 如：Your answer can't be true. 3. can/could表示推测时一般只用于否定句/疑问句，但是也可用于肯定句，只是比较少见。 其中could不表示过去式，而表示可能性较小。 如：I think the work can be completed ahead of time. 我认为这项工作能提前完成。 从常理来说，这里主要是表示禁止的意思，所以选mustn't。 couldn't在这里用会带有可能的意思，就是说司机可能不能酒后驾驶。从语法上说是可行的，不过现实上来说肯定没有mustn't用得好。 wouldn't有不应该的意思。 needn't是不需要的意思。
Drivers _____drive after drinking.It's dangerous.A.mustn't B Children()play with fife.it's dangerous A.must B.mustn't C.c Don't driver after drinking.It is dangerous. You ______ drive after drinking.It's too dangerous.A.may not You _____drive your car so fast.It's very dangerous. the river is dangerous.you ___ swim in it .A.can't B.mustn't You ___be here.it will be dangerous.A.mustn't B.should't You mustn't d---- too fast. It's very dangerous. drivers must't drive after drinking alcohol,( )they will be drivers shouldn't bd allowed ( ) after drinking ,or they wil don't drive after drinking .it is dangerous.改为if引导的条件状语从句 1、Don't drive after drinking.It is dangerous.(改为If引导的条件状语从句)