【题目】— I called you yesterday afternoon. But you didn’t answer me.
—Yesterday afternoon? Oh, I ________ in Olympic Sports Center.
A. am swimmingB. swimC. was swimmingD. will swim
在线课程【答案】C
【解析】
考查时态。句意：-我昨天下午给你打了电话。 但是你没有回答我 -昨天下午？ 哦，我正在在奥林匹克运动中心游泳。根据时间状语yesterday afternoon可知这里要用过去时态，四个选项中只有C项是过去时态，故选C项。