选出正确答案.
( )(1)这是一张美国地图。
A. Here is a map of the United States.
B. Here is the United States.
( )(2)这是美国的首都。
A. This is the capital city of the U.S.
B. This is the United States.
( )(3)首都是华盛顿。
A. The city is Washington.,D. C.
B. The capital city is Washington,D. C.