Question

When I came back yesterday evening, my brother ________ his homework.
A is doing   B. has done   C. was doing

Answer 1

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。