Complete each sentence with these words: reef, bay, dune, canyon, waterfall, mountain range, volcano, glacier. 1 There's often snow on the top of a very high.
2 It can be difficult to run up a because it's all sand.
3 When water goes over the edge of a , it often looks white.
4 A can be dangerous for ships, because it's just below the surface of the sea.
5 If a is active, it sometimes erupts and can be very dangerous.
6 It can take a very long time for a to move even as little as ten centimeters.
7 A is sometimes a good place for ships to stop, because it's protected by land on three sides.
There's usually a river at the bottom of a .
II. Translate these sentences. (Переведите эти предложения.)