阅读对话，回答问题。

A: Hello. I'm from a big country. Our capital is Ottawa. The Rocky Mountains are in our country. We speak

    English and French.

B: Hi! Look at the flag of our country. It's red. There are five stars on the flag. They are yellow.

C: The flag of our country has fifty stars. They are white. Canada is north of our country.

D: In our country, we speak English. Our country is west of China. We have a king or a queen. They live in

    Buckingham Palace.

1. A's country is ______________.

2. B is from ______________.

3. The 2012 Olympic Games will be held in ______________'s country. ______________ is the capital city.

4. Obama is ______________'s country's president. He lives in the ______________ ______________.