Travelling is a very good activity. When you are free, you can go to a beautiful place to enjoy the

beautiful view. You can breathe fresh air, meet different people and make friends with them. You can

also eat local nice food. It's good for your health to do so.

      But sometimes, travelling is not an enjoyable thing. For example the weather changes a lot. You may

feel sick while travelling. Even your money may be stolen.

      When you go on a trip, you must get everything ready. First, you should know about the weather.

Second, ask a friend to go with you so that you can help each other. Third you should be careful to keep

yourself safe. If you do this, you will enjoy your trip.

(答案不唯一)