【正文】
t make so much noise. The children ______an English lesson. having having have ! The phone ______. Please go to answer it. ringing ring met a good friend of mine while I______ on the street. walking walking 11.—What are you doing? —I’m ______ TV. 12.—Alan, it’s late. Why not go to bed? —Jenny hasn’t e back yet. I ______ for her. waited waiting