题目

---- I rang you yesterday afternoon. A man answered, but I didn’t recognize the voice.  ---- Oh，it____ my uncle. He was in my room then.  A. should have been                                   B. should be  C. must have been                                     D. must be   答案：C手机的功能越来越多，如通话、游戏、照相和上网等．通话时，我们听到的声音是由手机中的喇叭产生的；照相时，所成的像是（填“实”或“虚”）像．