We always to keep the environment clean by our teachers.

Tom is clever work out the problem.

    Some people prefer to travel by sea when possible. There are large liners and river boats. You can visit manycountries and different parts of your country on them, Ships are not so fast as trainsplanes, but travelling by sea is a very pleasant way to spend a holiday.

Many people like to travel by car. You can make your own. You can travel about three hundred miles or only fifty miles a day, just as you like. You can stop wherever you wish. There is always something interesting to see, at a hotel tothe night or at a good restaurant where you can enjoy a good meal. That is why travelling by car is popular for pleasant trips, while people usually take a train or a plane when they are travelling on business.

    Modern life is impossible without travelling. Theway of travelling is by plane. With a modern airliner you can travel in one day to the, which it took a month or more to get to more than one hundred years ago.

    Travelling by train is slower than by plane, but it has its advantages. You canthe country you are travelling through. Modern trains have comfortable seats and dining cars. They canmake the longest journey enjoyable.

    Making full use of time is important in our daily life. Maybe there are not enough hours in the day to accomplish all you need to do. Here are some opinions that might help you.

    ⒈Set up a plan. Go for a week at a time, Pay attention to the important things. Take the most important ones first, including things you want to accomplish.

    ⒉Control your stress(压力). If any stress happens to you, try to keep cool. Stressing out can lead to an early breakdown, which is bad for you when you have a lot of things to do. It's more relaxing to take a 30-minute walk and cool off than work all week with stress.

    ⒊Shut your door. Do your important tasks with your door shut, This will make sure you have high efficiency(效率).

    ⒋Pay attention to one thing at a time. If you do many things at a time, it will take you longer time to accomplish what you want to do.

    ⒌Just say "no". If other people often ask you for help,and you really don't have the time to help out, just say" no". You can't save the whole world.

    ⒍Stop wasting time on the phone. While talking on the phone, keep your talk short and to the point. Thus, you will waste much less time.

    ⒎Finally, be realistic (现实). You can only do what you can do. Don't set out to accomplish the impossible.

    As families today get busier and busier, it's important to your own mental health to keep things on track. Do it at once and you'll get your life in order(井然有序) now.

— I will buy _______________ of them so I can give one to my friend, Helen.