[单项选择]What's the population of the United States according to the passage
A. 7,000,000.
B. 14,000,000.
C. Twice of the young persons under twenty-five.
D. Not mentioned.

[单项选择]What's the population of the United States according to the passage


A. 7,000,000.
B. 14,000,000.
C. Twice of the young persons under twenty-five.
D. Not mentioned.

[单项选择]

Relations between the United States and Colombia suffered for many years because of an incident involving the Republic of Panama. By the en& of the Spanish-American War, Americans felt that an easier and faster: way was needed to ,get ships, from the Atlantic Ocean to the Pacific Ocean. Some people in the United States first believed that a canal across Nicaragua was the answer. However, President Theodore Roosevelt decided that a canal through Panama would be a better choice, In order to build the canal, the United States had to negotiate a treaty with Colombia, which at that time controlled Panama. Roosevelt offered Colombia, $10 million plus $ 250,000 a year for 99 years for a six-miles-wide strip of land across Panama. Colombia rejected the United States’offer. This angered President Roosevelt, and negotiations with Colombia, ended. In 1903，a revolution broke out in Panama. United States ships were sent by President: Roosevelt to protect the Panamanian revolutionari
A. to learn to accept something
B. on conditions that one/somebody else decides
C. to have a bad relationship
D. to get along with somebody

[单项选择]What is now the United States might have been divided into several countries ______ the South ______ the Civil War.


A. had, won
B. if, won
C. should, win
D. were, to win

[单项选择]Researchers in the United States carried out the study with the help of _______.


A. young people
B. some old people
C. men doctors
D. woman doctors

[单项选择]What is the meaning of "For the United States, the big news won' t be an abundance of new faces" in Line 1 of Paragraph 3

[单项选择]How many states are there in the United States
A. Thirteen.
B. Fifty.
C. Fifty one.
D. Sixty.

[填空题]Along the coast of the United States, the U.S. Coast Guard helps ships that get into difficulty at sea. The Coast Guard, like the Navy, is{{U}} (36) {{/U}}by the U. S. government. It receives the money that it needs from the government; therefore its ships, planes, and{{U}} (37) {{/U}}are very modern. In Great Britain the{{U}} (38) {{/U}}is very different. There are a small number of men, called lifeboatmen, who go out to help ships in trouble. These brave men often risk their lives, but they{{U}} (39) {{/U}}no money for their work. They live in small towns on the coast, and most have other jobs. The special lifeboats that they need are provided by the Royal National Lifeboat{{U}} (40) {{/U}}(R. N. L. I.), a private group which depends completely on money from private people. The R. N. L. I. does not accept any money from the{{U}} (41) {{/U}}. As a result, it can not always buy the best and most modern lifeboats. For example, about ten years ago, British researchers beg