--Hello, Sandy. This is Jack. What are you doing?---I’m watching a match. It started at 7:00 p.m. and _____ on for another an hour.
--- Which city has ________ population, Shanghai, Hong Kong or Qingdao? --- Shanghai, of course.
---you your homework yet? --- Yes. I it a moment ago.
--- Could you go to the park with me this afternoon? --- Sorry, I _______ there. I went there yesterday.
--- Have you washed your clothes ______? --- No, I haven’t. But I have cleaned the room _______.
I'll go to visit my aunt in England ________ the summer holidays start.