"这几个中必须选择一个"翻译一个地道的英语,谢谢

You must choose one exclusively from the following options.

alternative指的是几个可供替换的方案/选项。

其实简单写成：You must/(are required to) choose one of them. You are expected/encouraged to choose one of them. 就够了呀。

不提示上下文是不利于精准翻译的，我们会不明白你的用句场合环境、说话主体、所指内容、礼貌等等。建议补充。

We msut choose one of them.

alternative.