Based on the passage provided, here are the answers for each numbered blank:

31. A) to get
32. B) much
33. C) suffer

So the completed passage would read:

"Teenagers today live in a very competitive world. It is important than ever to succeed at school if you hope **to get** a chance in the job market afterwards. It's no wonder that many young people worry about letting down their parents, their peers and themselves. To try to please everyone, they take on too **much** until it becomes harder and harder to balance homework assignments, parties, sports activities and friends. The result is that teens **suffer** from stress."