The improved version of the sentences would be the following one:
2) Let's discuss the essay you read for homework
3) Khaya finally realized that she preferred research to teaching
4) A key step toward losing weight is to reduce the amount of food you consume
5) An arrogant manager rarely contributes to a suitable workplace
6) The faculty are making recommendations for the honor society
7) Colin applied to work part-time during the holidays
8) We should consider the possibility of traveling to China this summer
9) The president intends to hear both viewpoints
10) The chair finished the meeting offering plenty of ideas
11) Before making a serious purchase, such as a car, Derrell studies the competition
12) Living in a diverse community can have many benefits
13) The senator's homeland security policy was explained through a press release
14) Many colleagues have become unruly through being trapped in daily situations
15) Maya simpathizes with students who have test anxiety