1. She cannot accept that they broke up finally.
-> She couldn't accept the fact that they finally broke up.
2. They pointed out that drinking alcohol is unhealthy.
3. He didn't know whether the post office is nearby there was a post office nearby.
4. I wrote about what I experienced on the trip.
5. Do you know who they those men are?
6. When I heard your voice, my heart starts to be pound.
7. I can find out where Terry went is going.
8. It is hard to explain why I like rainy days a rainy day.
9. Please tell me how the accident happened come out.
10. He stopped by when you are were in class.
11. You should be unhappy in case that you marry Chris.
-> If you marry Chris, you will be unhappy.
12. Putting on weight, we should eat less.
-> Since we are putting on weight, ~
13. Although the company went out of business, the products of that company are still being used available.
14. While Though I am living in New York, I grew up in California.
15. In case Brian is coming, I will buy some extra food.
-> I will by some extra food in case Brian comes.