1. My father is always a careful driver.
→My father.....
2. Despite the heavy rain, they still went hiking.
→Although....
3. We were so interested in the comedy that we laughed from beginning to end.
→ The comedy .......
4. No other music festival in the world is as big and famous as the Rio Carnival
→The Rio Carnival is the .......
5. We are trying to find cheap and clean and effective sources of energy.
→ We are looking.