One and a half days与 One and a half apples 有什么区别?

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One and a half days与 One and a half apples 有什么区别?
One and a half days _____ all I can spare.Don't forget the apples.One and a half apples _____ left on the table.
A.is;are
B.are;is
C.was;were
D.were;was

key：A
One and a half days is all I can spare. 一天半是我所能挤出的全部时间.
例如：One and a half years is a long time for me.一年半的时间对我来说是很长的.〔这个句子谓语用单数是因为one and a half years表示的是一个整体时间,即time,是不可数名词〕又如,One and a half dollars is a little money. 1.5美圆并不是很多钱.〔钱money是不可数名词〕所以,一般情况下如果是时间,金钱,距离,重量等作主语并表示的是一个整体概念是,谓语动词多用单数形式.
但在下面这个句中就要用复数了,One and a half apples are left on the table. .这一个半苹果是你的.〔因为apple是可数名词,一个半就是复数了,不是整体的概念 ,因此谓语要用are〕

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