——你们医院那儿有多少女医生?
——女医生数量超过二十个。
—How many women doctors are there in your hospital?
—The number of them ____ over ____.
答案
is,twenty
知识点:名词短语

the number of“…的数量”,the number作主语,谓语动词用单数,因此正确答案为The number of, is。

略
