1. am resting, rest
2. are talking, talk
3. is drinking, drinks
4. goes, is going
5. Do they having dinner now? Do they have dinner at 2 o'clock?
6. What is she writing now? What does she write now?
7. What is he doing now? What does he do every Saturday?
8. What are they eating now? What do they eat at dinner?
в 1-4 предложении тупо слова вместо точек подставляешь (первое слово - в первое предлож, 2-ое - во второе)
а в 5-8 сразу готовый вариант написан