IX. Put in *on, in, at or by*.

Lý thuyếtTrang 193–194
  1. Water boils _______ 100 degrees celsius.
  2. My cellphone was stolen while I was _______ a business trip.
  3. Could you be quiet for a minute, please? I'm _______ the phone.
  4. In Britain, children start school _______ the age of five.
  1. We sat _______ the shade. It was too hot to sit _______ the sun.
  2. Did you go to Germany _______ business or _______ holiday?
  3. Can I pay _______ credit card? ~Yes, of course. But it's cheaper if you pay _______ cash.
  4. He got married _______ 17, which is rather young to get married.
  5. There was an interesting program _______ the radio this morning.
  6. _______ my opinion, violent films should not be shown _______ television.
  7. When you do the exam, you're not allowed to write _______ pencil.
  8. The earth travels round the sun _______ a speed of 107,000 kilometers an hour.
  9. Look! That car is _______ fire! Please call the fire brigade.
  10. I pressed the wrong number _______ mistake.
  11. It's a long journey. Let's stop somewhere _______ the way and have a meal.

Chủ đề này chưa có bài tập trong sách.