Question

【题目】The two boys ______ Canadians.

A. are both B. both are C. are all D. all are

Answer 1

【答案】A

【解析】

句意：这两个男孩都是加拿大人。both用在两者之间；all用在三者或三者以上。根据The two boys，这两男孩可知，排除C/D。both用在系动词之后。故选A。