Exercise 3

Choose the correct form...
  1. I think you shouldn't  [sleep] so little. It's not healthy.
  2. Gerda is a heavy smoker. She  [smokes] 40 cigarettes a day.
  3. What  [are you doing] ? –  [I'm trying] to open the bottle.
  4. Who  [translated] this book into Spanish?
  5. We  [were stopped] by policemen on the motorway when we were  [going] home from our holiday.
  6.  [Do you believe] me? I'm telling you the truth.
  7. I  [don't have] to see it.
  8. About twenty people  [were arrested] by the FBI.
  9. What  [happened] ?
  10.  [Do you have] to stay at work so late?