谁帮把这些英语单词造句一下 spend cost pay take athlete successful certain

1.I spent two hours on my homework
2.This pair of shoes cost me 100 dollars.
3.I pay him 50 dallars for his help.
4.It takes me 3 days to clean my house.
5.All the athletes do excellent job.
6.Everyone wants to be successful.
7.I'm quite certain of that.

These athletes have successfully taken part in this cost reduction program by paying special attention in how they spend time in certain gym equipment.

是连词成句，还是分别造