Помогите пожалуйста кто отлично знает английский. Put the adjectives in the correct form. 1)The air in

Помогите пожалуйста кто отлично знает английский. Put the adjectives in the correct form. 1)The air inthe city is (polluted) than in the country. 2) The Sahara desert is (hot) than the Amazon rainforests. 3) African elephants are (big) than Indian. 4) Polar bears are (aggressive) than koala bears. 5) Sharks are (dangerous) than dolphinis.