分类：教育/科学-学习帮助
问题：单项选择19.
19. -- what are you doing over there?--i'm _______ a .a. listening to b. talking to c. playing with d. waiting for
回答：D---你在那儿做什么呢?---我在等出租车呢listeningto---听...b.talkingto---对...讲话 ayingwith---玩耍