四级作文题目：Reduce Waste on Campus
　　(a)
　　Nobody could have failed to notice the fact that wasting has become a grave problem in many campuses. In the dining hall, much food are left in the plates and dumped into the trash can. In the classroom, blank or half blank pieces of paper are left on the desks. In the dorm building, taps are left open and water left running or dripping all the time. And there can be more such examples.
　　In view of the expanding population and the shortage of various resources, wasting is really a harmful habit. It put strains on the already short supply of food, water, electricity and the like. Besides, it goes against traditional virtue of hard work and simple living and may leads to a luxurious life style, which is dangerous to the souls of mankind.
　　Therefore, it is high time that we take steps to stop wasting. We should start from trifles around ourselves: remember to turn off the tap when we finish washing; try to order the exact amount of food we can consume; never throw away any blank or half blank pieces of paper. And always remember, a penny saved is a penny earned.
　　(b)
　　Nobody could have failed to notice the fact that wasting has been a grave problem with which we are confronted. Taking a look around, we can find examples too numerous to list: in the dining hall, much food are left in the plates and dumped into the trash can; in the classroom, blank pieces of paper are left on the desks; in the dorm building, taps are left open and water left running all the time.
　　Wasting is bound to generate severe consequences if we keep turning a blind eye to it. First and foremost, it put strains on the already short supply of food, water, electricity and the like. Besides, it goes against traditional virtue of hard work and simple living and may leads to a luxurious life style, which is dangerous to the souls of mankind.
　　In view of the seriousness of this problem, effective measures must be taken before things get worse. First, it is essential that regulations be worked out and enforced to ban wasting. Secondly, students should enhance their awareness of saving resources. With proper laws and an alert public, it will only be a matter of time for wasting to become a thing of the past.