Question

(   ) 2. —I hear that about two fifths of the students      the exam.

       ——Yes. It was very difficult.

A. hasn't passed B. has passed

C. haven't passed D. have passed

Answer 1

2. C分数短语作主语时，谓语动词的单复数取决于分数后面的名词，故用have; 由答语可知此空为否定，故选c。