unless在这里做连词,连接两个句子,所以一定接一个句子,主语+谓语+其他,而主语在前面提到,所以后面可以连be动词一起省略,（the children/they are）told to do so.A.是一个非谓语VING形式,所以错误,需排除
the children are required not to leave the building unless.t
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相关问题
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英语 Don't leave the building unless I tell you to改为同义句
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Please tell Tom not to leave the classroom unless he ______
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Please don't leave the building _______ to do so.
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requirement builds on the love to you
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1.Dont leave the room unless I tell you to=Dont leave the ro
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英语翻译Requirements that are not related to the project and tha
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the children are too young to dress (t＿）
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if the parents still live, the children should not leave hom
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don't leave the school if you are not allowed.when do the st
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The children are not old enough to take care of____.