Travel is a very good activity. When traveling, you can relax   , forget your tiredness or troubles, and have the energy to take on the new tasks waiting for you.
But sometimes traveling is   an enjoyable thing. For example, the weather can be changeable. If you can climb a mountain, it may rain suddenly. You may be caught in the rain and may catch a cold. The worst thing is that you may have your money stolen   you may have an injury. All these terrible things are     can happen to you.
Therefore, when you are going on a trip, you    make a good preparation  , you must have clear information about the weather. Secondly, you should choose     good companion (同伴) so that you can help each other. Thirdly, you must be careful enough and try to avoid accidents.    you do this, you will surely enjoy your travel.