Complete the sentences using degrees of comparison.
Example:The blue whale is langer (large) than any of the dinosaurs.

1 Amazon is the ____ (long) river in the world 2 The Amur is the _____ (long) river
in Russia 3 The Amazon is ____ (long) than the Amur 4 Everest is the _____ (high) mountain in the world 5 The great white shark is the _____ (dangerous) shark. 6 The blue whale is much ______ ( large) than the great white shark. 7 Dolphins much ____ (clever) than sharks.