9 . 阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

People need transportation to move from one place to another. As time went by, transportation methods improved. Especially after the invention of airplanes, they made travel more convenient and     1     （easy）.

The airplane     2     （invent）by Orville and Wilbur Wright in 1903.     3     first airplane, Wright Flyer I, flew 36.5 meters in 12 seconds. After that, the two brothers kept     4     （improve）their airplanes. They     5     （fly）in public in France in 1908, and started taking passengers with them. Ever since, many other people made great efforts to improve and develop airplanes. Thanks to their efforts, airplane technology developed     6     （extreme）fast.

Today, airplanes have many different     7     （apply）. People can use airplanes to travel to other countries, send urgent mails and help people     8     danger. They use airplanes to send water, food, medicine, etc. to cities that need help. However, airplanes are not only used in positive ways,       9     they are also used to fight wars.

Many things     10     （change）since the invention of the airplane. Airplanes have made travel or transport faster. Airplanes have really changed our lives.

10 . Movies about the future often show people travelling around in flying cars. Last Tuesday, that vision came a step closer to reality for a Japanese company called SkyDrive, as it showed off its new flying car, the SD-03, in action. The small car flew around for four minutes, staying about 1-2 meters off the ground.

The SD-03 is powered by batteries and has 8 motors, which lift it straight off the ground. What made this test flight special was that a pilot was on board. Toraohiro Fukuzawa, who leads SkyDrive，said, “Of the world’s over 100 flying car projects, only a handful have succeeded with a person on board.”

Many groups worldwide are working to develop flying cars. Some governments, including Japan’s, are supporting the idea, hoping that in the future, flying cars will be useful for short trips like taxi rides in cities. Flying cars could also help reach places that can’t be reached by road.

What happens when a motor fails? If flying cars are crossing a city, an accident could hurt not just people in the car, but people on the ground, too. That’s why the SD-03 has eight motors—as backups.

Some people believe flying cars reduce traffic jams. But new systems will be needed to help control traffic in the air. With many cars flying around, these systems would be too complicated to be managed in real time by humans. Besides, flying cars are expensive. When it’s ready, SkyDrive’s flying car is expected to sell for between $300,000 and $500,000.

However, people who believe in flying cars point out that cars and airplanes faced challenges at first, too. With time, many of the big problems were solved. By 2050, Mr. Fukuzawa hopes people will be able to fly anywhere inside Tokyo in just 10 minutes. “I think flying cars will become normal in the near future.” he says.

1. What was special about this test flight?

A．The car flew higher.	B．The car was cheap.
C．The car flew on its own.	D．The car carried a driver.

2. Why is the SD-03 equipped with eight motors?

A．To ensure its safety.	B．To increase its flying speed.
C．To make it look cool.	D．To enable it to carry more weight.

3. Which aspect of the flying cars is mainly discussed in paragraph 5?

A．Their design.	B．Their application.
C．Their cost.	D．Their disadvantages.

4. What is Mr. Fukuzawa’s opinion about flying cars?

A．They can be easily bought.	B．They have a long way to go.
C．They have a promising future.	D．They are environmentally friendly.