با توجه به متن به سوالات ۱۲ تا ۱۵ پاسخ دهید :
Miss Richards was a teacher at a school for boys and girls. She taught chemistry and physics from the lowest to the highest classes in the school. Sometimes the new classes learned quickly, but sometimes they were very slow , and then Miss Richards had to repeat things many times. One year , `What is water?` `Who knows?Hands up! `
There was silence for a few seconds, and Miss Richards felt unhappy but than one boy raided his hand .
`You , Dissk?` said Miss Richards happily. He was not of the best children in the class , so she was happy that he could answer.
`Water is a liquid which has no colour until you wash your hands in it . Then it turns black`. The boy answered.
When the students couldn't understand the lesson, the teacher had......... .12
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