the teachers in the school is one hundred and of them are women teachers.A. A number of

问题补充：

the teachers in the school is one hundred, and of them are women teachers.

A. A number of; four-fifth

B. The number of; four-fifth

C. A number of; four-fifths

D. The number of; four-fifths

答案：

A. A number of; four-fifth

B. The number of; four-fifth

C. A number of; four-fifths

(答案→)D. The number of; four-fifths

解析：句意：在这所学校老师的总数是100，老师中的五分之四是女老师。A number of …许多的……，the number of…,···的总数。在英语中分子用基数词表达，分母用序数词表达如果分子大于1，分母变复数。根据句意，故选D。