题目内容：

    Thirteen-year-old Madison Williams was studying in her bedroom when Leigh Williams, her mother, told her that a little boy fell into a septic tank(化粪池）and no one could reach him.

Madison and Leigh ran to a neighbor's yard, where they found the boy's worried mother and other adults surrounding the tank opening. It stuck out a few inches above the ground and was 11 inches in width-slightly wider than a basketball-with a hatch(盖子)that had been moved unnoticed. The two-year-old boy had slipped in and was drowning in four feet of waste water inside the eight-feet-deep tank.

Madison surveyed the situation. She was the only one who could fit through the small hole. Without hesitation, she told the adults, "Lower me in. Inside, the tank was dark, and the air was smelly . In the process , she jammed her left wrist against a hidden pole , injuring the muscles in her wrist so severely that the hand was left useless.

Rather than tending to her injury ,Madison tried to feel the underwater boy. Minutes went by before she saw the outline of his foot. Madison shot her good hand out and grasped the foot tightly "Pull me up!" she shouted. Then, ten minutes after Madison had entered the tank, she and the boy were lifted out.

But the boy wasn't out of trouble. He had lacked Oxygen long enough that he wasn't breathing. He was placed on his side, and an adult hit him hard on the back. It was only when Madison heard him cry that she knew he was all right . It took Madison longer to recover than the boy, who was taken to hospital and left hospital that same night .She, however, experienced months of painful treatment, for the injury that she had postponed tending was more severe, which, says neighbor Mary Holley, made the girl's actions all the more impressive.

1.What most likely caused the boy to fall into the septic tank?

A.The tank was very hard to be noticed.

B.The boy was curious about the unknown.

C.The hatch was not in the correct position.

D.The tank opening stood out on the ground.

2.Why did Madison take longer to recover?

A.The injury to her wrist became worse

B.She wasn't sent to hospital in time.

C.She paid all her attention to the boy.

D.Serious infection set in to her wound.

3.Which of the following can be used to best describe Madison?

A.Modest. B.Optimistic.

C.Courageous. D.Hard-working.

4.What is the text mainly about?

A.A lucky little boy. B.A terrible drowning accident.

C.A hidden septic tank. D.An admirable teen hero.