6. Read the conversation between Alex and his grandfather, Jack, and answer the questions.
Jack : Did you know that when I was your age, we used horses for travel?
Alex : Really? How long did it take to travel by a horse?
Jack : It took many hours, sometimes even days, to reach another town. However, the journey was slow and peaceful. Horses needed just food and water, and you could enjoy the scenery.
Alex : Today, planes can take you to another country in just a few hours.
Jack : Yes, I remember the first time I flew on a plane. It was two years ago. I felt nervous and frightened because of the speed. Although planes are scary, they save time and can take you across the world.
a.
What is the main difference between travelling by horse and travelling by plane?
b.
When did Jack first fly on a plane?
c.
How did Jack feel about travelling by plane for the first time?