1. What is the main idea of the passage? 
　　　A) A man was wounded in a shot-gun accident.
　　　B) Scientific research on food changes succeeded.
　　　C) Changes of food in our body became known.
　　　D) The man with a hole in his side survived.

　　2. A hole in a man’s side made it possible for scientists to _____. 
　　　A) see how a human stomach works
　　　B) supply the man with food
　　　C) operate on the man
　　　D) study food

　　3. What happened to the man? 
　　　A) He cut himself.
　　　B) He was shot by a gun.
　　　C) He had a car accident.
　　　D) He suffered from stomach ache.