英语10.As you can see,the number of cars on roads _______ rising these days.10.As you can see,the number of cars on roads _______ rising these days.a.was keeping b.keep c.keeps d.were keeping为什么

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英语10.As you can see,the number of cars on roads _______ rising these days.10.As you can see,the number of cars on roads _______ rising these days.a.was keeping b.keep c.keeps d.were keeping为什么
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英语10.As you can see,the number of cars on roads _______ rising these days.10.As you can see,the number of cars on roads _______ rising these days.a.was keeping b.keep c.keeps d.were keeping为什么
英语10.As you can see,the number of cars on roads _______ rising these days.
10.As you can see,the number of cars on roads _______ rising these days.
a.was keeping b.keep c.keeps d.were keeping
为什么

英语10.As you can see,the number of cars on roads _______ rising these days.10.As you can see,the number of cars on roads _______ rising these days.a.was keeping b.keep c.keeps d.were keeping为什么
选C
因为是these days,属于现在时或现在完成时,故排除 a d
the number of表示“……的数量”,跟复数名词连用作主语时,中心词是number,谓语动词要用单数.

是不是选C。。。
如果是选C的话。。我就可以解释。。
首先,the number of cars 的中心词是of 前的number,为单数。所以排除B D
these days可以用现在完成时或现在时
但不能用过去时.Those days作时间状语时才用过去时。。谢谢。。

B keep

A
the number of表示“……的数量”,跟复数名词连用作主语时,中心词是number,谓语动词要用单数。
these days说明动作正在进行。

选A
首先这句句子的主语是number而不是cars,所以是单数,是过去发生的,用was.而是这几天正在发生的事情,所以要用现在进行时态。
解释为:就像你所看到的,这些日子中,路上车辆的数量正在增加。

1、the number of+n.+三单,所以B、D肯定不对
2、由于这种情况仍持续(these days),所以是一般现在时,所以答案为c

选C
the number of ……的数量 [中心词是number,单数]
区别:a number of 许多……[复数]
又由于有these days,要用现在时,排除A,D