Complete the sentences. Use enough, not enough, or too, and the adjective. 

1. Subaru's boat was ____  (big) for two people.

2. A boat is ___ (expensive) for me to buy because I don't have much money.

3. Crossing the ocean alone is ____ (difficult) for most people to do.

4. My parents say I'm ____ (old) to travel alone. I have to wait until I'm 18.

5. I think Subaru's trip was ____ (dangerous) for a young person. His parents should not have let him go alone.

6. A trip to San Francisco by plane is a fun adventure, and it's ____ (safe) for my family and me. Maybe we'll go there for our next vacation.