【正确答案】A Letter of Appeal April 14, 2013 Dear teachers and students, What a pity to see much waste in our university! There are lots of lights left on after leaving, many taps left on after cleaning and leftovers thrown away after dining. Hence, we sincerely put forward the following proposals: 1. All students and staff should spare no effort to increase our economical awareness. 2. Let us begin with tiny things at once. From now on, we should turn off lights and taps in time, get a doggie bag if there is food left over after meals, and stop using air-conditioners if it is unnecessary. 3. We should develop the good habits of saving water, electricity, food and other things around US. Let"s get started together now; let"s help to build a beautiful campus hand in hand. The Students" Union