People who drink wine ＿ to drive .为什么不能用isn't allowed People who drink wine ＿ to drive .B.isn't allowed D.mustn't be allowed 【答案是D,我想知道B为什么错了,难道是因为“be allowed to”结构中的be不能够与is are

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Peoplewhodrinkwine＿todrive.为什么不能用isn''tallowedPeoplewhodrinkwine＿todrive.B.isn''tallowedD.mustn''tbeall

People who drink wine ＿ to drive .为什么不能用isn't allowed People who drink wine ＿ to drive .B.isn't allowed D.mustn't be allowed 【答案是D,我想知道B为什么错了,难道是因为“be allowed to”结构中的be不能够与is are
People who drink wine ＿ to drive .为什么不能用isn't allowed
People who drink wine ＿ to drive .
B.isn't allowed
D.mustn't be allowed
【答案是D,我想知道B为什么错了,难道是因为“be allowed to”结构中的be不能够与is are什么的互相转换吗?求学霸解答十分感谢(｡･ω･｡)ﾉ♡√】

D选项
mustn't be有禁止的意思，表示酒驾之人严禁开车，B选项在程度上没有那么强烈。