单选题Would you risk your life for a country that considered you a second-class citizen? Would you join a military that asked you to risk sacrificing your life but separated you from other soldiers because of the color of your skin? That is precisely what the Tuskegee Airmen did. They were brave, intelligent, African-American men and women who fought for the United States in World War Ⅱ. In 1940, President Franklin Delano Roosevelt agreed to allow African Americans to fly airplanes in the military. Before that, African Americans could only serve in the Armed Forces as part of the ground troops. The first African American airmen reported for duty in 1941. They began their training outside of Tuskegee, Alabama. The soldiers were completely separated by race and the two races could not communicate. About 450 African American pilots finished the training. These men were the original Tuskegee Airmen. The Tuskegee Airmen had an amazing record. They did not lose any of the bombers they were escorting (护航). When the war was over in 1945, the Tuskegee Airmen were heroes. But when they returned to America, they were appalled to find out that they were still treated like second-class citizens. They faced the same segregation (种族隔离) and discrimination (歧视) as they had before they began their training. Frederick Henry, one of the original Tuskegee Airmen, lives in Detroit, Michigan. Because he was from the North, he would often forget the segregation rules of the South. Once, Henry was on a bus alone with a white bus driver. Soon, after the two has talked for a while, a wave of other passengers came on the bus. A problem arose when some white passengers were still Standing, which was against the rules. Henry was put off the bus, even though he was the first person to board the bus and had paid his fare. One thing did change, however. In 1948, President Harry S. Truman signed an executive order prohibiting segregation on the military. Eventually, the Tuskegee Airmen were officially thanked for their amazing efforts in the war.

单选题He (tried to) learn Greek but (soon) got (tired of) it and (gave up it).

单选题I feel like ______ to the owner of the house to complain. A. writing B. to write C. write D. having written

单选题The writer walked back to the table where he had been sitting because ______.

单选题The shop she usually did her shopping ______ every Saturday has been pulled down for the City Center.

单选题With all your brains you ______ the math test, but you failed. You were too careless.

单选题Speaker A: If I am not mistaken, your birthday is coming up. Has your brother sent you anything? Speaker B: Not yet.______.

单选题Your mother told me that you overslept this morning, ______?

单选题You can arrive in Guangzhou on time for the fashion show __________ you don’t mind taking the night train.

单选题Mommy: John, where are the cakes? Don"t tell me you ate them all! John: ______ I couldn"t help it.

单选题Dad wondered where I"d been, and I ______ a story about being at Grandma"s.

单选题You are saying that everyone should be equal, and this is ______ I disagree.

单选题What matters ______ not winning but participating. A. are B. to be C. was D. is

单选题Every time my wife goes shopping, she ______ buy some food for my daughter. A. should B. will C. shall D. must

单选题______ the first to use nuclear weapons.

单选题How many more decades will have to pass ______ scientists succeed in providing a cure for cancer? A．when B．before C．since D．until

单选题I received my wages yesterday, ______ I can now pay what I owe you.

单选题Speaker A: Where did you celebrate your birthday last year? Speaker B: ______. A year ago today, I was a passenger on an Air Greece plane. I had just left my sister"s home in Athens and was on my way to school in New York.

单选题It was twelve o'clock at midnight ______ they arrived at a ______ village.

单选题He passed the examination ______ the satisfaction of his parents. A. for B. to C. with D. in