7. There are over 300 teachers in our school of them are women teachers.A. two fifthsB. s

问题补充：

7. There are over 300 teachers in our school, of them are women teachers.

A. two fifths

B. second five

C. two five

D. two fifth

答案：

(答案→)A. two fifths

B. second five

C. two five

D. two fifth

解析：英语中一般用基数词表示分数的分子，用序数词表示分数的分母。当分子是一时，分数的分母用单数形式，在表示分数时，当分数的分子大于一时，分数的分母要用复数形式。句意；我们学校有超过300名老师。他们中五分之二是女老师。结合语境可知选A。