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
网友回答
A解析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。