Today we live in a world where GPS systems, digital maps, and other navigation apps are available on our smart phones._____（1）of us just walk straight into the woods without a phone. But phones_____（2）on batteries, and batteries can die faster than we realize._____（3）you get lost without a phone or a compass, and you_____（4）can't find north, a few tricks to help you navigate_____（5）to civilization, one of which is to follow the land

When you find yourself well_____（6）a trail, but not in a completely_____（7）area, you have to answer two questions: Which_____（8）is downhill, in this particular area? And where is the nearest water source? Humans overwhelmingly live in valleys, and on supplies of fresh water. _____（9）, if you head downhill, and follow any H20 you find, you should_____（10）see signs of people.

If you've explored the area before, keep an eye out for familiar sights—you may be_____（11）how quickly identifying a distinctive rock or tree can restore your bearings.

Another_____（12）: Climb high and look for signs of human habitation._____（13）, even in dense forest, you should be able to_____（14）gaps in the tree line due to roads, train tracks, and other paths people carve_____（15）the woods. Head toward these_____（16）to find a way out. At night, scan the horizon for_____（17）light sources, such as fires and streetlights, then walk toward the glow of light pollution.

_____（18）, assuming you're lost in an area humans tend to frequent, look for the_____（19）we leave on the landscape. Trail blazes, tire tracks, and other features can_____（20）you to civilization.