读短文，写出正确的国家。 I'm dreaming to visit the U. S., Canada, the U. K. and Australia. My plane is flying to the west from Beijing. So the first country I will visit is ____________. Then my plane is still flying to the west. I can see beautiful Rocky Mountains on the plane. Now I arrive in ____________. Then I arrive in ____________, the president Obama meets me at the airport. At last, I land on ____________'s land. Many kangaroos are around me. I'm glad to see them.