请听下面一段独白,根据独白内容完成下列句子,每个空格不超过3个单词。听独白前你将有50秒的时间阅读句子内容。独白读两遍。
16. Staying healthy while traveling can make your trip ________.
17. First, you can wear ________ shoes, a hat and sunglasses.
18. Doing lots of sports like ________ or climbing will be really useful during your trip.
19. Don’t eat dirty ________ or drink cold water.
20. Finally, have enough time to ________ during your trip.