Question

__________ of his parents are doctors.

A．Each

B．Both

C．All

D．Some

Answer 1

B

试题分析：句意：他的父母都是医生。A. Each 每一个；B. Both两者都；C. All 三者或三者以上都；D. Some 一些，根据句意及句中系动词are可知此题选B。