Read the text. Then choose the correct answer for questions 31-32

Read the text. Then choose the correct answer for questions 31-32.
In 1948, Dr. Percy LeBaron Spencer was working on a radar-based research project when he felt something sticky in his pocket. It turned to be a melted peanut bar, Spenser guessed that it had been affected by high radio emission from the radar. Intrigued, he sent the boy out to buy a packet of popcorn. When he placed it close to the radar, the popcorn exploded. By the end of this year the first prototype microwave oven was installed in a Boston restaurant.
31.When did the idea of microwave technology come to Dr. Spencer?

1. 
   When he was working in the laboratory.
   
2. 
   When he saw a boy eating popcorn.
   
3. 
   When he was cooking in the restaurant.
   
4. 
   When he was buying peanut bars and popcorn.
   

32.What does the word "affected" mean?

1. 
   Involved B) Concerned
   

100. 
     Influenced D) Interested
     

21-variant