The students the Art Festival when I passed by their school.
A. celebrate
B. were celebrating
C. will celebrate
D. have celebrated
网友回答
A. celebrate
(答案→)B. were celebrating
C. will celebrate
D. have celebrated
解析：考查过去进行时，难度适中，当我经过学校是，学生正在庆祝艺术节，由passed一词可知是一般过去时，答案选B。