1. They have a valuable ____collection_____ 's item. (Collect)
2. Japan is said to be a _____mountainous________ country. (mountain)
3. Some package trips to ThaiLand are ____surprisingly____ cheap. (Surprise)
4. The ___growth______ of trees occurs very slowly. (Grow)
5. Finding that the play _____uninteresting________, we turned off the TV. (Interest)