Question

When Jim’s mother came in, he _______ his homework.

When Jim’s mother came in, he _______ his homework.A．is doing B．has done C．was doing[来源:学#科#

Answer 1

C

试题分析：句意：当吉姆的母亲进来时，他正在做作业。表示过去某一时间正在进行的动作用过去进行时，所以选C。