阅读理解。
In most part of the world, many students help their schools make less pollution. They join "Environment Clubs". In the environment club, people work together to make our environment clean.
Here are some things students often do.
No garbage （垃圾） lunch. How much do you throw away after lunch? Environment Clubs ask
students to bring their lunches in bags that can be used again. Every week they will choose the classes that make the least garbage and report them to the whole school.
No cars day. On a no cars day, nobody comes to school in a car. No students and no teachers. Cars
give pollution to the air, so remember to walk, run or go to school by bike. Turn off the water. Do you
know that some toilets can waste twenty to forty cubic meters of water an hour? In a year. that would fill
a small river. So students often mend those broken toilets.
We love our environment. Let's work together to make it clean.
根据短文内容，完成短文。每空填写一词。
1. Environment Clubs ask students not to____ lunch bags.
2. From the passage, we know most students eat their lunch at ．
3. On no car days, neither students nor____ will go to school by car.
4. After the students mend the broken toilets, they save a lot of .
5. The writer wrote this passage to ask the students to make __ __ pollution.
个，当末位为2或4时有
个，∴所有偶数的个数为312，故选B