If you are lost in the mountain, don’t get nervous. Staying calm will greatly 　   your chances of survival. Many people think that good preparation is very 　  . But actually the most important thing is to keep calm. In order to survive, you can do the following things.
First, find a hiding place.
Unnecessary movement will make you 　  . You’d better find a hiding place to rest in order to save your 　  . If you are in snow, you may be able to dig a cave for protection
　   the cold weather.
Second, send a signal(信号) to searchers for help.
The best time to 　   a signal for help is during the day. Do this from the 　   point. It will be easier for searchers to see you. If you take a box of matches, build three smoky fires with some dry branches and the 　   will tell other people where you are.
Third, do not walk away.
Walking away will make it more difficult to find you, 　   searchers will try to follow your path and may 　    you if you have gone off in a different direction. Searchers often find a car with no one in it.

A．reduce B．increase C．include D．prove

A．helpless B．hopeful C．important D．useless

A．strong B．weak C．happy D．sad

A．food B．money C．water D．energy

A．from B．at C．for D．off

A．buy B．send C．take D．borrow

A．low B．high C．lowest D．highest

A．smoke B．matches C．box D．branches

A．but B．because C．although D．so

A．catch B．fetch C．miss D．run