1. In my opinion, making contributions to help people in need is a duty as a normal person. = In my opinion, making contributions to help people in need is a duty.


2. Yesterday, at the news, going up the stairs can serve the purpose of encouraging people improve their memories as well as enhance their health. = Yesterday, there was a news about climbing up the stairs, which purposely helps improve people's memory as well as their health.

3. Discussing with other members in my lab is instrumental in coming up with the idea = new ideas.


4. Hillary Clinton is popular with Hollywood stars. = Hillary Clinton is popular among Hollywood stars. On the contrary, Donald John Trump is popular with extraordinary = among seasoned stars such as Mike Tyson, Dennis Rodman, and Charlie Sheen.