动词时态1. I called you at 4:00 yesterday afternoon, but no one answered.Sorry, I _ with my friends at that time.A. swimB. swamC. will swimD, was swimming2. Excuse me, where is Mr. Browns office?Sorry, I dont know. I_ here for only a few days.A. workB. workedC. have workedD. will work3. Where is Bob?He_to Harbin for a meeting.A. wentB. has beenC. has gone4.Dont make so much noise. The children_an English le
