According to _____ survey conducted last month,_____ fourth of the post.90’ s college graduates

问题描述:

According to _____ survey conducted last month,_____ fourth of the post.90’ s college graduates
According to _____ survey conducted last month,_____ fourth of the post.90’ s college graduates prefer online job-hunting.
A.a; a B.a; the C.the; a D.the; the
正确答案是A.为什么不是C呢?survey 后有给出特定的时间,那么survey应该是特指,那就应该用the啊为什么会用a呢?

上个月不只做了一个survey,此处 a survey 表示是上个月做的多个surveys 中的某一个
说实话这题有点坑,看着答案能这么想通,但是做的时候就很纠结了,A 或C都讲得通