This is a true story. Tristin Saghin enjoyed the movie Black Hawk Down very much，which is

This is a true story. Tristin Saghin enjoyed the movie Black Hawk Down very much，which is about the conflict in Somalia.The battle scenes and the exciting rescues of people who are dying，interested him greatly.
There was just one problem：Tristin was only 9 years old，and it was thought that movie was not for children. When his parents caught him watching it on TV，they made him turn it off，though he had finished his homework and it was not late. Then one day，Tristin and his family were visiting his grandmother in Mesa，Arizona. Tristin’s 2­year­old sister got out of the house and fell in the backyard pool. Realizing the little girl was missing，the family ran outside，only to find the girl had fallen into the water.
Pulled from the pool and placed on the ground，the child wasn’t breathing. The family called the ambulance (救护车)，but no one knew how to do first aid. No one，that is，except for Tristin. A scene in Black Hawk Down describes a doctor giving first aid. Tristin remembered it. Then the 9­year­old gave first aid to his sister at once and saved her life.
His parents don’t stop him seeing the movies he likes any more. Tristin taught himself how to do first aid but he had never thought he could use it to save his little sister’s life. Any skill can be used in time，so you should always learn.
【小题1】Black Hawk Down is a(n)    ．A．war movieB．edyC．action movieD．love film【小题2】Why did Tristin Saghin’s parents order him to turn off the TV?A．They wanted him to help look after his sister.B．He often spent too much time watching films.C．They thought the film was not good for children.D．He was asked to finish his homework first.【小题3】The author’s purpose in writing the text is to advise readers to    .A．see more moviesB．learn more skillsC．save others bravelyD．do what they likeA