题目内容：

It was early morning. Peter Corbett helped Mark Wellman out of his wheelchair and onto the ground. They stood before El Capitan, a huge mass of rock almost three-quarters of a mile high in California's beautiful Yosemite Valley. It had been Mark's dream to climb El Capitan for as long as he could remember. But how could a person without the use of his legs hope to try to climb it?

Mark knew he couldn't finish the climb alone, but his friend Peter, an expert rock climber, would be there to lend a helping hand. He and Mark thought that it would take seven days to reach the top.

Peter climbed about 100 feet up and hammered a piton (岩钉) into the rock. Fastening one end of a 165-foot rope to the piton, he let one end of the rope fall down. Mark caught the rope and fastened it to his belt with a special instrument. This instrument would allow Mark to move upward, but would prevent him from falling even as much as a single inch. He next reached above his head and fastened a T-shaped bar to the rope, using the same kind of instrument.

Mark took a deep breath, pushed the T-bar up almost as far as his arms could reach, and began the first of the 7,000 pull-ups needed to reach the top. High above, Peter let out a cheer. “You're on your way.”

Seven years before, at the age of twenty-one, he had fallen while mountain climbing, injuring his backbone. The fall cost him the use of his legs, but he never lost his love of adventure or his joyful spirit.

For the first four days the two men progressed steadily upward without incident. But on the fifth day an unbearably hot wind began to blow, and as time went by, it became stronger and stronger, causing Mark to sway (摇摆) violently on his rope. But Mark kept on determinedly pushing up the T-bar and pulling himself up. In spite of that, he had to admit that he felt a lot better when the wind finally died down and his body touched solid rock again.

It took them one day more than they had expected, but on July 26 at 1:45 in the afternoon, the crowd of people waiting on the top went wild with joy as the two heads appeared. Mark Wellman had shown that if you set your heart and mind on a goal, no wall is too high, no dream impossible.

1.What had Mark Wellman long desired to do?

A．To finish one of the most difficult rock climbs in the world.

B．To be the first to climb El Capitan.

C．To climb the highest mountain in California.

D．To help his friend Peter climb El Capitan.

2.How did Mark climb the mountain?

A．He fastened the rope to his wheelchair.

B．He hammered in pitons so that he had something to hold on to.

C．He held on to the T-bar and Peter pulled him up.

D．He pulled himself up using a T-bar and special equipment.

3.What was the worst problem Mark had during the climb?

A．He struck against the rock and hurt his arms.

B．A strong wind blew him away from the rock.

C．He kept falling several inches.

D．While swaying in space, he became terrified.

4.How did Mark react to difficulties during the climb?

A．He admitted that he was frightened.

B．He often worried about his friend's condition.

C．He was able to remain clam and determined.

D．He was joking to cheer himself up.