题目内容：

Last week, two companies, Kitty Hawk and Uber, announced their plans to bring flying cars to reality very soon.

Imagine never having to worry about traffic, stop lights, or road construction. A flying car would get to a place much faster than one travelling by road. On the other hand, imagine having to avoid drones (无人驾驶飞机) and other flying cars. Also, what if your battery dies when you are in the air? And, how will you know where to land?

Kitty Hawk is a start-up tech company supported by Google co-founder, Larry Page. According to the Kitty Hawk website, its car will be able to travel at speeds up to 40 kilometers an hour in the air. It says under US aviation law such a machine “does not require registration or a pilot’s license and may be flown in uncongested (不拥挤的) areas for recreational purposes.” As of now, the car can only be flown over fresh water.

Kitty Hawk is making a list of people interested in buying the flying car. They must pay a deposit of US$100. Those who get their names on the list early will receive US$2, 000 off the final cost of the car. However, Kitty Hawk has not yet announced the price. Kitty Hawk expects its first flying cars will go on sale by the end of this year.

At a conference last week, Uber announced plans for flying taxis to begin carrying passengers. Unlike the Kitty Hawk company, Uber does not plan to build its flying cars. Instead, it will use the resources of partner companies.

Like the Kitty Hawk car, Uber flying taxis will use electric power. Uber says its flying taxis could travel up to 241 kilometers an hour. The company said that could reduce the travel time between San Francisco and San Jose, California from two hours on the road to 15 minutes in the air.

Riders could use the Uber app to book a flying taxi to take them to their destinations. The company has not yet said how costly air taxi travel would be compared to road taxi travel.

1.What could the main problems for flying cars be?

A. There is not enough space for them to land.

B. Sky transportation would cause more traffic jams.

C. They may hit other flying cars or have a dead battery in the sky.

D. They travel much more slowly than travelling by road.

2.According to the passage, the pilots of flying cars ____________.

A. must be professional pilots    B. are not required to have a pilot’s license

C. are required to fly in crowded space    D. are not only allowed to fly in urgent situations

3.What is Kitty Hawk doing to attract customers?

A. Reducing the price for all customers.

B. Giving rewards to those visiting its website.

C. Advertising its first flying cars on public media.

D. Offering a discount to those paying a deposit early.

4.What is the difference between Uber and Kitty Hawk in the flying car market?

A. Uber’s flying taxis will use electric power.

B. Uber intends to build its flying cars to fly very fast.

C. Uber prefers to use the resources of partners rather than build its flying cars.

D. The trips made by Uber’s flying taxis are much cheaper than road taxis.