阅读下面短文，根据短文内容，从题中所給的A，B，C，D四个选项中，选出最佳选项。
（A）
Some Advice on Travel
1)．Forget about fashion．Always wear your most comfortable clothes when going on long journeys（旅行）．
2)．Traveling on trains and buses can be boring, so take a good book to read．
3)．If you're going somewhere cold, remember to take your warm clothes．
4)．If you're going somewhere sunny, remember to wear sunblock（防晒霜）and sunglasses．
5)．Always take a camera with you to capture those special moments．
6)．Be careful with your things whenever you go to busy places, like a train station．There are often thieves there!
7)．Always leave room in your bag for presents．
8)．Most countries have lower prices for students, so if you have one, take your student card with and save money．
；②
；③
；④
（a为常数，且