阅读两篇短文。从每小题所给的四个选项中,选出能回答所提问题或完成所给句子的最佳答案。
It's not WASTE until it is WASTED
With the World Environment Day coming, our school is now requiring every student to form a habit of sorting the waste.
Here in our schoolyard we lay four different colors of rubbish bins for different kinds of rubbish. The red is for harmful waste; the blue is for waste that can be recycled(循环再用); the green is for kitchen waste; the yellow is for other waste.
The following are some instructions for you
Glass: Empty bottles without caps can be recycled to make new glass bottles.
Warning: Mirrors and light bulbs(电灯泡) must not be included in the glass waste.
Paper: Newspapers, magazines, boxes must be clean enough to be recycled.
Warning: Paper tissues (餐纸) and wall paper are not recyclable as paper and should be kept separately.
PMD waste: Packaging made of Plastic or Metal and Drink boxes are used to make new packaging.
Warning: Plastic pots(e. g yoghurt pots ), plastic bags must not be included with the PMD waste.
Harmful waste: out-of-date drugs, used batteries(电池)， paint and oil…
Besides, if you don't need your old bikes at all, our school volunteers will collect them. We're going to fix them up and then give them away to kids who don't have enough money for a bike.
To find out more about recycling, you can visit our school website.
的值为16，则循环体的判断框内①处应填的是 （ ）