Question

--- Were you at school when he came to see you ?
---- Yes, I __________ a math class .
A. had           B. was having        C. am having

Answer 1

B

解析试题分析：句意：当他来看你的时候你在学校吗？是的， 我当时正在上一节数学课。根据上下句可知是过去进行时态，故选B。
考点：考查过去进行时的用法。