Mark the letter A, B, C, or D to ind...

Câu hỏi: Mark the letter A, B, C, or D to indicate the correct response to each of the following exchanges. Two friends Nam and Lan are talking about the topic of healthy lifestyle and longevity.

A. Why do they need to keep fit?

B. It's very important for old-aged people to have a healthy lifestyle.

C. I do think so. As the main labour force of the country, they must be strong.

D. It doesn't cost much to work out in the gym these days.