Rick left class early because he......a headache. A. had B. have C. used to have D.was having.

Question

请帮我选正确答案，以及原因是什么？

Answer 1

答案A
因为是left,就表明是过去式,显然排除B,
而C,used to do表示过去常常做某事,
D是过去进行时,句意与时态不符.

Answer 2

A