Đáp án: C

Script:

Thu: How was your travel to Alaska, Ron?

Ron: It was fantastic. Although it was very cold, I did many interesting activities like ice fishing or sleeping in a big igloo.

Thu: Wow! How did you move there?

Ron: I rode a dogsled pulled by powerful dogs on the snow and through the forests. It was like getting lost in a marvelous snow kingdom.

Thu: Sounds cool. I’m a dog lover, so I really want to try travelling with those native dogs. Did you see any bears?

Ron: No, I didn’t. Because I went there in October when all bears often sleep.

Thu: What a pity!

Ron: Yes, I know. But I had a great chance to see the northern lights. They were too beautiful to describe in words.

Thu: Awesome! I’m sure Alaska will be on the list of my future destinations.

In my opinion, we (not use) coal for cooking and heating in the future.