The song reminds me of my old school days as soon as it _____ .
--- 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.