—How many women doctors are there in your hospital?
— them over twenty.
- A.A number of; are
- B.A number of; is
- C.The number of; are
- D.The number of; is
答案
正确答案:D

a number of…“一些/若干……”,the number of…“……的数量”。句意为“——你们医院有多少女医生?——女医生的数量超过了20个”,可知第一空填the number of。当the number of…作主语时,谓语动词要用单数,故第二空填is。答案为D。

略
