1. I called you at 4:00 yesterday afternoon, but no one answered.Sorry, I _ with my friends at that time.A. swim B. swam C. will swim D, was swimming2. Excuse me, where is Mr. Browns office?Sorry, I dont know. I_ here for only a few days.A. work B. worked C. have worked D. will work3.Where is Bob?He _to Harbin for a meeting.A. went B. has been C. has gone4. Dont make so much noise. The children _an English lesson.A
