Решение:
Заполним пропуски подходящими прилагательными из списка:
- The road to the top of the hill was so steep that we couldn't cycle up it.
- You can't swim in the stream because the water is too deep.
- It was difficult to see anything in the dark cave.
- The water is very shallow here. You can't see the bottom.
- The coast is very rocky here. There isn't a sandy beach.
- The stream is quite narrow here. It's easy to jump over it.
Ответ: 1. steep; 2. deep; 3. dark; 4. shallow; 5. rocky; 6. narrow.