问题
选择题
When I came back yesterday evening, my brother ________ his homework.
A is doing B. has done C. was doing
答案
答案：C
时态的用法。句意：当我昨天晚上到的时候，我的哥哥/弟弟正在做家庭作业。根据句意，应该用过去进行时，故答案为C。
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When I came back yesterday evening, my brother ________ his homework.
A is doing B. has done C. was doing
答案：C
时态的用法。句意：当我昨天晚上到的时候，我的哥哥/弟弟正在做家庭作业。根据句意，应该用过去进行时，故答案为C。