Read the text and choose the correct answer.
Canada is huge! It is the second-largest country in the world by size. Canada is known for its large lakes, cold winters and great hockey teams.
Canada has (16) _________ open space. If you were to travel out to central or western Canada, you would definitely find (17) _________ animals per square than people. The St. Lawrence River is a major (18) _________ of western Canada. It makes part of the boundary between (19) _________ United States and Canada. This river flows northeast from Lake Ontario to the Atlantic Ocean.
One of the largest (20) _________ features in central Canada is Hudson Bay. Take a look at a map of Canada and you'll be able (21) _________ it right away. It looks a little bit like someone took a huge bite out of Canada! Hudson Bay is home to many different kinds of animals including fish, seals, walruses, and musk oxen.