People can reduce, reuse or recycle waste instead of throwing it away. Matt and Sam decided to do an

People can reduce, reuse or recycle waste instead of throwing it away. Matt and Sam decided to do an experiment to see how much waste the three R's could save.
First, they collected the rubbish from six classrooms at their school and then divided the rubbish into three groups:
•things that were reusable, such as a pencil or a marker
•things that could be recycled, such as cans, glass, or paper
•things that were truly waste
Then, Matt and Sam weighed each of the three groups. They discovered that 84% of the total rubbish thrown away that day could be recycled or reused. They decided to do something about it.
 
Matt and Sam presented the idea of starting a recycling programme to the school leaders. Then they worked with the Student Council. They prepared brochures for the students and their families about recycling. After thinking over the possibility of the programme, the school bought colored containers for each classroom. Besides, each room received a blue container for paper and a green container for glass and cans as well as a red container for real rubbish.
Within a short time, each classroom in the school was sorting recyclable materials from rubbish before it was thrown. To check the school’s progress, Matt and Sam weighed the rubbish one more time. They collected the rubbish from the red containers from the same six classrooms as before, sorted the rubbish into three groups again and weighed each group. This time, they found that the red containers were filled with 90% real waste. Only 10% of recyclable materials had been thrown into the red containers. Matt and Sam were pleased with their efforts.
25. Why did Matt and Sam do the experiment?
A. To see what could be reused.
B. To see what could be recycled.
C. To see how much waste students produced.
D. To see how much waste the three R's could save.
26. What did Matt and Sam do in the recycling programme?
A. They worked by themselves.
B. They made a speech on recycling.
C. They wrote brochures about recycling.
D. They bought colored    containers for each    classroom.
27. How much real rubbish    was thrown into     the red containers after the experiment?
A. 84%. B. 10%. C. 90%. D. 100%.
28. Which word can best describe Matt and Sam?
A. Friendly. B. Generous. C. Confident. D. Responsible.
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