In Feb. （）came President Nixon’s historic visit to China.

单项选择题（）part is the most densely populated region in America.

A.The southern
B.The northeastern
C.The western

单项选择题The political system of the US is based on the following except （）

A.federalism
B.the constitutional monarchy
C.the separation of powers
D.respect for the constitution
E.the rule of law

单项选择题The American War of Independence started in （）and ended in （）

A.1776，1784
B.1775，1783
C.1706，1714

单项选择题Washington, the capital of the US, is on the （）river.

A.Potomac
B.Delaware
C.St. Laurence

单项选择题（）has the sole right to interpret the Constitution.

A.The Cabinet
B.The Supreme Court
C.President
D.Congress