题目内容：

    Traveling is one of the most important activities and people have been interested in it for many years. Modern traffic develops fast, so traveling to different places has become much easier and faster than before. Staying healthy while traveling can make your trip better. But do you know how to keep healthy during a trip? The following information may be useful to you.

◆Before leaving

Wear comfortable shoes, a hat and sunglasses.

Take some necessary medicine with you. They can be useful when you get sick or have other problems.

Do some exercise for weeks or months before you leave if you plan to do lots of walking or climbing during your trip.

Prepare proper food. Before you prepare the food, the first thing you need to think about is how long you will travel with the food. If you take a long trip, you should bring food such as bread, biscuits (饼干) and some fruit. They don’t go bad quickly. People can bring meat, fish, eggs, milk and even salads and vegetables on a short trip.

◆While traveling

Be sure not to eat dirty food or bad fruit.

Have enough time to take a rest during your trip.

Tap water (自来水) is not safe, so drink bottled water (瓶装水) and always clean the cover of the bottle.

Keep food in good condition. If you take hot food, you should try to keep it hot. For example, you can put it in heavy towels. If you need to keep cold food cold, you can put cold food in a box with ice. When you arrive, put cold food in the fridge (冰箱). Remember: If you travel with food, keep hot food hot and cold food cold.

根据短文内容，用适当的词汇补全表格中所缺信息，每空不超过3个词。

How to keep healthy during a trip
Before leaving	Wear comfortable shoes, a hat and 1..
Exercise for weeks or months before you leave.
Prepare proper food. Take bread, biscuits and some fruit for a 2.or bring meat, fish, eggs, milk and even salads and vegetables for a short one.
While traveling	Never eat 3.food or bad fruit.
Have enough time to 4.during your trip.
Keep food 5.. Be sure to keep hot food hot and cold food cold.