1. Many people came to enjoy the program in spite of the expensive entrance tickets. (although) 

→ Many people came to enjoy the program, although the entrance tickets is expensive.

2. Although it is not a rush hour, there is a lot of traffic now. (however)

→ It is not a rush hour. However, there is a lot of traffic now.

3. I thought that the film would be boring, but in fact it was really good.   (nevertheless)

→ I thought that the film would be boring. Nevertheless, it was really good.

4. Watching this horror film made us feel terrified. (terrifying)

→ It was so terrifying when we watch this horror film.

5. Flying from Vietnam to Australia was so tiring to us. (tired) 

→ We was so tired to fly from Vietnam to Australia.

`1.` `->` Many people came to enjoy the program, although the entrance tickets is expensive.

`2.` `->`  It is not a rush hour. However, there is a lot of traffic now.

`3.` `->`  I thought that the film would be boring. Nevertheless, it was really good.

`4.` `->`  It was so terrifying when we watch this horror film.

`5.` `->` We was so tired to fly from Vietnam to Australia.