Combine the sentences using a subordinator to make a complex sentence

EX:[combine the sentences using a subordinator to make a complex sentence. number 1 is an example for you.]
--1.i'm going to the bank. i need some money.--
--i'm going to the bank because i need some money.--
2.I made lunch. I got home.
3.It's raining.She's going for a walk in the park.
4.She finishes her homework soon, she will fail the class.
5.He decided to trust Tim. He was an honest man.
6.We went to school.She decided to investigate the situation.
7.Jennifer decided to leave Tom. He was too worried about his job.
8.Dennis bought a new jacket. He had received one as a gift last week.
9.Brandley claims that there will be trouble. He doesn't complete the job.