[单选] The United States 美国 The United States is the country closest to Canada． It has 50 different states． The capital city of the United States is Washington D．C． Who was the first president of the United States？ It was George Washington． Which is the biggest state in America？ Alaska is the biggest state in America． And Rhode Island is the smallest state in America．I．Read and choose．阅读短文，选择正确的答案。（）1．（）is the capital of the United States．