The number of students atttending the university______(rise) steaduly since 2000用been rising 吗

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The number of students atttending the university______(rise) steaduly since 2000用been rising 吗
The number of students atttending the university______(rise) steaduly since 2000
用been rising 吗

The number of students atttending the university______(rise) steaduly since 2000用been rising 吗
应填has been rising.
有since引导时间状语,主句用现在完成时或现在完成进行时.
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应该是:
has risen
后面有since 2000 ,这是完成时的标志
主语是三单,所以用has
自2000年开始,上大学的学生人数急增
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