听短文，判断正误。正确的用“T”，错误的用“F”，短文读两遍。
( )1. The United States is on the south of Canada.
( )2. Canada is one of the largest countries in the world.
( )3. The population in Canada is larger than that in the United States.
( )4. The rivers in the United States are more than that in Canada.
( )5. In the north of Canada it is always warm while in the south it is cold.
