Our class 55 students at that time.
A. consisted of
Bconsists of
Cmade up of
Dwas consisting of
网友回答
A. consisted of
B. consists of
C. made up of
D. was consisting of
解析：考查动词短语和时态。Consist of=be made up of由…组成。Consist of没有被动语态，也进行时的形式。句意：那个时候我们班级由55个学生组成。根据at that time（在那时）说明使用过去时。故A正确。