The number of college students in China_ gre atly since 1990A has increased B have increased C are increased D was increased

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The number of college students in China_ gre atly since 1990A has increased B have increased C are increased D was increased

The number of college students in China_ gre atly since 1990A has increased B have increased C are increased D was increased
The number of college students in China_ gre atly since 1990
A has increased B have increased C are increased D was increased

The number of college students in China_ gre atly since 1990A has increased B have increased C are increased D was increased
A
这句话的主语是number
since是一个非常明确的时间状语 有since 必然接完成时

这里就要弄清楚句子的成分与结构了，第一个have是做定语从句来修饰students的The number of the college students 能用单数吗? the college students

选A
在"the number of college students in China"中，"the number"是修饰"college students in China"的，所以主语是”the number" ，是单数，所以动词应该用第三人称单数；
"since"表示从什么时候以来，对现在有影响，是一个非常明确的完成时状语，所以要用完成时。

a number of the number of the number of,a small number of,a number of. the number of造句 the number of造句 the reciprocal of number the number of中文 the number of 是什么意思? the number of同义词 The number of students Number of the black the number of、a number of、large number的区别 翻译the system of number The total number of 中文 the number of的用法 a number of the students What’s the number of The number of errors( )surprising the number of revolutions是什么意思?