单选题 The First World War broke out on July 28th, ___ and ended on November 11th,____, lasting for about four years.(　　)

单选题 The Articles of Confederation was accepted by all the__states in__(　　).

单选题 The first ten amendments, known as (　　), were added to the Constitution in 1791.

单选题 The American War of Independence started in___and ended in____(　　).

单选题 During the Civil War Lincoln issued the (　　), which declared the abolition of slavery.

单选题 The Constitutional Convention was held in 1787 to revise (　　).

单选题 The following states are among the first thirteen colonies except (　　).

单选题 The First Continental Congress was held in (　　) in September, 1774.

单选题 In 1844 the U.S. forced the Chinese Government to sign the first unequal treaty of (　　).