问题
选择题
The United States _______ fifty states , one of which is separated from the others by the Pacific Ocean.
A．consists of
B．is consisted of
C．are made up of
D．makes up
答案
答案：A
考查固定短语和主谓一致。The United States作主语时，谓语动词要用单数，排除C; consist of由……构成，无被动，排除B；make up构成……，与句意不符。所以选A。