根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
If you like exploring the wilderness, you should read the following suggestions from search-and-rescue rangers(搜救队) in the national parks. 【小题1】
Before you head out on a hike, check the weather, take plenty of water, and make sure someone knows where you’ll be and when you’ll be back. Bring clothes to keep you warm when wet, like a waterproof jacket. Avoid cotton, which traps damp. 【小题2】 Take basic precaution, such as waterproof matches, a folding saw, a good knife, a first-aid kit, a flash light, and batteries.
The minute you think you might get lost, stop. 【小题3】 And you should stay calm and think rationally(理性地). If you are not alone, focusing on the needs of others can help hold your own fears at bay. Keeping a sense of humor helps too.—it reduces stress and promotes creative thinking.
In general, people who try to find their own way out are far worse than those who stay put（呆在原处). 【小题4】 In a wide-open area, make a signal with colorful gear, make a big X out of rock, or dig a shallow trench, which are easy to spot from above.
You can go several days without eating, so in most cases, you’d better not search for food, since there are lots of poisonous plants in the wild. But you need to stay hydrated(含水的). 【小题5】 If you are lost in your car, stay there: You are more visible to rescuers. And the car provides shelter. A．Stay visible so anyone searching can see you.B．First, you’ve got to acknowledge you’re in trouble.C．And you have no idea where to go.D．The search-and-rescue people call it death clothes.E.First of all find a shelter and stay in it in order to keep dry.
F.These suggestions may keep you alive in emergencies.
G.If you run out of water, It’s usually better to drink from a stream with suspect water than to go without.F
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(答案→)F
解析：本文叙述了外出旅行时应该注意的事项。
【小题1】根据…you should read the following suggestions from search-and-rescue rangers(搜救队) in the national parks. 可知应选F。
【小题2】根据Bring clothes to keep you warm when wet, like a waterproof jacket. Avoid cotton, which traps damp.上文不要带棉布的衣服，是因为搜救队称它为死亡之衣，故选D。
【小题3】根据The minute you think you might get lost, stop.要停下来看是否自己真的迷路了，故选B。
【小题4】In general, people who try to find their own way out are far worse than those who stay put（呆在原处). 和In a wide-open area, make a signal with colorful gear, make a big X out of rock, or dig a shallow trench, which are easy to spot from above.可知一旦迷路了要找一个比较开阔的让别人容易找到的地方，故选A。
【小题5】根据But you need to stay hydrated(含水的)故选G。