1. Open the brackets. Put the verbs into the correct form. 1. How often Liz (to travel) by plane? 2. His parents (to enjoy) travelling by sea to Africa last July? 3. You (to travel) light or heavy last win- ter holidays? 4. Why they just (to put) back our flight by three hours? 5. We (to fly) at a speed of 800 km per hour in ten minutes. 6. They (not to take) a motocoach to the plane yet.

Ответ:

1. How often does Liz travel by plane?
2. Did his parents enjoy travelling by sea to Africa last July?
3. Did you travel light or heavy last winter holidays?
4. Why have they just put back our flight by three hours?
5. We will fly at a speed of 800 km per hour in ten minutes.
6. Have they not taken a motocoach to the plane yet? (assuming it refers to a past event)

Note: In sentence 5, the verb "will fly" is used in the future tense, which is more appropriate since it is talking about a future action.