five days () enough .A.is B.are 选A还是选B,为什么?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/11 15:16:52

A
five days 在这里被看成是【一段时间】
表示时间、距离、金钱等的复数名词作主语时谓语动词的形式当名词词组中心词为表示度量、距离、金额、时间等复数名词时,往往可以根据意义一致的原则,把这些复数名词看作一个整体,谓语动词用单数形式.如：Three years has passed.三年已经过去了.
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再问：【举例】时间做主语在什么情况下单数，什么情况下按复数，两者都举两三个句子做例子好吗
再答：我说了表示“时间、重量、长度、价值”等的名词的复数作主语时，谓语动词通常用单数形式，这是由于作主语的名词在概念上是一个整体，再如：Thirty minutes is enough for the work. One hundred miles is quite a long way. Twenty dollars is not enough.

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