【题目】—l went to your office at 9：00 yesterday morning，but you were not in．
—Sorry，1 _____________ with the manager in the meeting room at that time．
A. am talkingB. was talkingC. were talkingD. have talked
在线课程【答案】B
【解析】
考查时态和主谓一致。句意：——昨天早上9点去你的办公室，但是你不在。——对不起，那时我在会议室和经理谈话。此处指昨天9点钟正在做某事，所以用过去进行时态，句子主语是I，be动词用单数，故选B。