Directions： Complete the following passage by filling in each blank with one word that best fits the context.
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 not ________ enjoyable thing. For example, the weather can be changeable. If you climb a mountain, it may rain suddenly. You may be caught  ________ the rain and may catch a cold. The  ________ 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 must make a good preparation. Firstly, you must have clear information about the weather. ________， you should choose a good companion 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.