题目内容
Bob and David are friends. __________ of them work in the art club as volunteers.
| A．All | B．Both | C．Each | D．Every |
B
解析试题分析：句意：鲍勃和大卫是朋友。他们两个在那个艺术俱乐部做志愿者。all（三者或三者以上）都；both(两者)都；each每一个；every每一个。根据Bob and David可知此处指的是两个人，根据谓语work是非第三人称单数形式，故用代词both，故选B。
考点：考查代词的用法。
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