1. a. The helicopter tour is earlier than the boat tour.
b. The bus tour is the most earliest tour of them all.
2. a. The helicopter tour is not as long as the bus tour.
b. The boat tour is the longest tour of all.
3. a. The bus tour is not as expensive as the boat tour.
b. The helicopter tour is the most expensive tour of all.
4. a. The helicopter tour is more more interesting than the boat tour.
b. The bus tour is the most interesting tour of all.