【2011•河南省】25. —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 swimming
25.答案：D。考查动词时态。首句说：我昨天下午4点钟给你打电话，但是没人接。下句显然是要告诉对方当时正在做什么，故用过去进行。句意：…，我当时和我的朋友们在一起。
