Question

【题目】Sally took a photo of her friends while they________computer games．

A. play

B. are playing

C. have played

D. were playing

Answer 1

【答案】D

【解析】试题分析：本题主要考查过去进行时。

根据句意，萨利在她的朋友们玩电脑游戏的时候给他们拍了一张照片。表示过去正在进行的动作，用过去进行时 was/were + doing 的形式。又因为主语是 they，故 be 动词用 were。因此 were playing 符合题意。故正确答案为D。