阅读下面短文，从每题所给的四个选项A、B、C、D中选出最佳选项。

　　When the wind blows, many things move. Things and people are moved whichever. way the wind blows. They may go over water, on the water, over land, or on land. History is filled with stories of people who used wind and air for fun and travel. One story that goes back about 3 000 years tells of two Greek men who escaped from prison by using wings made of feathers and wax(蜡) The story says the wax wings melted when one man flew too near the sun. His feathers fell off and he crashed into the sea. If those Greeks had used hang-glider or self-soaring wings for their prison escape, there wouldn't have been any wax for the sun to melt. Of course no one believes they got near the sun anyway.

　　For self-soaring or hang-gliding there should be wind, and plenty of it. A wind of 20 miles per hour or more is good for flying. Before flying, a rider sets up his hang-glider at the top of a hill. The hang-glider must be unfolded and set up facing into the wind. If the front or point isn't facing the wind, the hang-glider may go flying without the rider.

　　Hang-gliders are made of tightly woven cloth, lightweight metal rods(杆), and strong wires. The cloth is so tightly woven that it's almost airtight. The rods and wires should be made of very strong material. If something should break during a flight－well remember the Greeks.

　　People have always wanted to fly, and people have always wanted to add beauty to their lives. Beauty can come from colors, shapes, and forms. Self-soaring people add beauty to their hang-gliders with colors and decorations(装饰). Quite often a person may have a hang-glider specially made by a professional hang-glider builder. The hang-glider builder can let the buyer pick the cloth for color and decoration. But when it comes to the shape, the professional builder doesn't let the buyer have much to say. A hang-glider has to be built to fly. That's why the shape is important. People who build their own hang-gliders can decorate them any way they like, but if the shape isn't right, they wouldn't do much flying.

　　After being strapped(绑扎) in, a hang-glider is ready to go. The flight starts with a downhill run into the wind. The wind catches the hang-glider and gives the rider the lift needed to fly. For the first part of the ride, the rider tries for speed and altitude(高度). Without these, a flight may be over before it even starts. As soon as the hang-glider gains speed and altitude, a flier can start to control the direction of flight. For a right turn, the rider leans to the right and moves the steering bar(操纵杆) to the left. This tips the hang-glider to the right and it makes a turn. For a left turn, the rider leans left.

1．Who decides on the shape of a hang-glider?

[　　]

A．The buyer.

B．The hang-glider builder.

C．The government

D．The rider.

2．The fact that history is filled with stories of how people used air for travel shows that people ________.

[　　]

A．have never wanted to fly until the 20^th century

B．have never even thought about flying until recently

C．have always been interested in flying

D．thought flying was only a funny story

3．When the hang-glider begins traveling high enough and fast enough, the hang-glider flier should ________.

[　　]

A．end the flight right away

B．pay more attention to the shape of the hang-glider than the color and decoration

C．fly higher not to fall into the sea

D．control the direction of the flight

4．The underlined word “self-soaring” in the second paragraph means ________.

[　　]

A．a way of flying without power

B．something out of the ordinary

C．moving the bar

D．running downhill into the wind