1、

_ divides the Eastern coastal area with the Central and Western part of USA.

（5分）

正确答案

第一空： 

Appalachain Mountains

解析：

2、

West to the mighty Mississippi River is a vast open area called _ .

（5分）

正确答案

第一空： 

Great Plains

解析：

3、

The continental divide of US is _ rising over 4,260 meters above sea levels.

（5分）

正确答案

第一空： 

Rocky Mountains

解析：

4、

The _ is the longest river in North America and flows about 4,087 kilometers from western Montana among to the just north of St. Louis, Missouri where it joins the Mississippi River.

（5分）

正确答案

第一空： 

Missouri River

解析：

5、

Along the U.S.-Canada border lies the world's largest group of freshwater lakes, the five interconnected _.

（5分）

正确答案

第一空： 

Great Lakes

解析：

6、

The northernmost state of US is _.

（5分）

正确答案

第一空： 

Alaska

解析：

7、

The _ is the seat for US Capitol of Senate and House of Representatives.

（5分）

正确答案

第一空： 

Capitol Hill

解析：

8、

American society from 1950's to 1970's witnessed rapid social changes, one of which for racial equality, called _.

（5分）

正确答案

第一空： 

Civil Rights Movement

解析：

9、

Before the ratification of the US Constitution, the states were governed under the _.

（5分）

正确答案

第一空： 

Articles of Confederation

解析：

10、

The system _ was established by the US Constitution for prevention of any of the three branches to have too much power.

（5分）

正确答案

第一空： 

checks and balances

解析：

11、

The power of US is spread among three branches of the state: the _ (President), the _ (House of Representatives & Senate), and the _ (Supreme Court).

（15分）

正确答案

第一空： 

executive

解析：

12、

The changes made to the US Constitution is called an _.

（5分）

正确答案

第一空： 

amendment

解析：

13、

The image of US Democratic Party is represented by the animal of a _, while the image of the Republican Party by _.

（10分）

正确答案

第一空： 

donkey

解析：

14、

The US _ in 1791 guarantees freedom of religion, speech, press and so on.

（5分）

正确答案

第一空： 

Bill of Rights

解析：

15、

Charges brought against the president by Congress is called _.

（5分）

正确答案

第一空： 

impeachment

解析：

16、

The general election of US President is an indirect one through _, which consists of 538 presidential electors from the fifty states and Washington, D.C.

（5分）

正确答案

第一空： 

Electoral College

解析：

17、

January 20 or January 21 if 20 falls on a Sunday at the U.S. Capitol building is the _, on which the _ and _ are sworn in and take office. 

（15分）

正确答案

第一空： 

Inauguration Day

解析：

18、

The _ amendment of US constitution gives rights of keeping weapons

（5分）

正确答案

第一空： 

second

解析：

19、

Charges brought against the US President by Congress is called _.

（5分）

1、

The Battle of Saratoga occurred in September and October, 1777, was a decisive victory for the Continental Army and a crucial turning point in the Revolutionary War.

（5分）

正确答案： 正确

解析：

2、

Union army defeated Confederate army at Gettysburg, in 1863, a turning point for the Civil War.

（5分）