A: Hi Lan. Have you taken part in any volunteer activities yet?
B: Hi Nam. In fact, I have parcitipated in quite a lot.
A: Why do people volunteer?
B: I think because of what volunteer activities can do to help the disadvantaged, the disabled or the environment.
A: Anything else?
B: By doing those activities, we may be more sociable and gain a better knowledge of the world around us.