Exercise 4. Заполните пробел правильной формой прилагательного, данного в

Exercise 4. Заполните пробел правильной формой прилагательного, данного в скобках:
Эталон:
What is the (high)mountain in the world?
What is the highest mountain in the world?
1. What is (long) river in the world? What is (far)planet from the Sun? 3. Which of the Canadian provinces is (large)______ than the province оf Ontario? 4. In Greek mythology what was (prominent)______feature of a cyclop? 5. What human invention was the first object to travel (fast)_____than the speed оf sound? 6. In what country did the world's (bad)____ nuclear disaster take place in 1986?