16. 1) Did Mum and Dad fly to India last week?

2) Mum and Dad didn't fly to India last week.

17. 1) Did you and Tom late for the tour this morning?

2) You and Tom didn't late for the tour this morning.

18. 1) Did you make hot dogs for the dinner last night?

2) You didn't make hot dogs for the dinner last night.

19. 1) Did Hans and Peter go to visit Times Square at five o'clock.

2) Hans and Peter didn't go to visit Times Square at five o'clock.

20. 1) Was Betty in the capital city of the USA this summer?

2) Betty wasn't in the capital city of the USA this summer.