Approved April 24, 1800, the act of Congress that made provision for the removal of the government of the United States to the new federal city, Washington, D.C., also established the Library of Congress. 这句话的主语是the act of Congress吧,其后that引导限制性定语从句进行修饰,从句中的made provision和established并列。然后~~><~~这句话的谓语动词是approved吗???我怎么突然看不清了呢。。。。