题目内容：

Madison Williams was studying in her bedroom when the door burst open．It was her mother，Leigh williams，with a frightening and incredible story，“A little boy fell into a septic tank(化粪池)，and no one can reach him．”Then she made this request of her 13-year-o1d daughter，“Can you help?”

Madison and Leigh ran to a neighbor’s yard，where they found the boy’s anxious mother and other adults surrounding a septic tank opening．The opening was only slightly wider than a basketball．The boy，who was only two years o1d，had slipped in and was drowning in four feet of waste water inside the tank．

Madison quickly surveyed the situation．She was the only one who could fit through the small ho1e．Without hesitation，she got on her stomach next to the opening，placed her arms out in front of her，and told the adults，“Lower me in．”

Leigh and others held her waist and legs．“I wiggled(扭动)my arms and shoulders until I got through the opening，”Madison said．Inside，the tank was dark，and the air disgusting．Madison jammed her left wrist against a pole，injuring the muscles in her wrist and arm so severely that the hand seemed useless．Madison shot her good hand out and grasped the boy’s foot tightly．“Pull me up!”she shouted to the others above．

As they were pulled to the surface，the boy’s free foot got stuck under the inside lip of the opening．“Lower me down!”she yelled．“I had to wiggle his foot until it was free，”she told Reader’s Digest．Then，ten minutes after Madison had entered the tank，she and the boy were lifted out．

“Madison’s a hero，”Holley，one of her neighbors said “What other teenage girl is going to voluntarily go into a septic tank?”

1.Madison was asked to help the boy because________．

A. she was brave enough to help the boy

B. she knew how to survey the situation

C. she could fit through the small hole to get the boy

D. she was willing to help others in trouble

2.According to the text，we can learn that__________．

A. the boy’s mother was too scared to rescue her son

B. a boy was trapped when reaching for his basketball

C. Madison Williams was choked in the disgusting air

D. the two kids got out of danger with the aid of the adults

3.Which might be the main idea of the passage?

A. A boy fell into a septic tank．

B. A mother requested her daughter to save a boy．

C. A neighbor helped a girl out of trouble．

D. A girl rescued a little boy from a septic tank．