Sometimes people call each other “scared cat”, but have you ever thought about this expression? When a cat is 　　1　　, its heart starts beating faster, its muscles get tense(紧张的), and there are changes in the chemicals in its bloodstream．　　2　　 the cat doesn't realize this, its body is getting ready for action．If the danger continues, the animal will do one of two things．It will defend itself, or it will run away as fast as it can．

　　Something like this also happens 　　3　　 people．When we are excited, angry, scared, or aroused by other emotions, our bodies 　　4　　 many physical changes．Our hearts beat faster, and our muscles get tense．All of these changes make us more careful and ready to react．We, too, get ready to defend ourselves or 　　5　　．

　　Human beings, 　　6　　, have a problem that animals never face．If we 　　7　　 our feelings and let them take over, we can 　　8　　．Have you ever said something in anger, or hit somebody, and regretted it later? Have you ever shouted at a teacher, told somebody you were lonely, or said you were in love, and then 　　9　　 later you had kept your mouth shut? It isn't always wise to express your feelings freely．

　　Does this mean that it's smarter always to hide our feelings? No! If you keep feeling of anger, sadness, and 　　10　　 hidden away or bottled up inside, your body stays tense．Physical illness can develop, and you can feel churned up(生气)inside．It can actually 　　11　　 your health．(It is not bad to keep pleasant feelings inside either; all feelings need to be expressed．)You can hide them and you can pretend they don't exist, but they'll still be around．And at last you'll have to deal with 　　12　　．

完形填空

　　A friend of mine met with an accident driving in the darkness．His legs were so hurt that he couldn’t 　　1　　．What was worse was that he found himself unable to ask for help－his mobile phone didn’t 　　2　　．Nothing could be done but 　　3　　 in cold wilderness．It was 8 hours later that day broke, and then the 　　4　　 of the rescue．

　　It is almost 　　5　　 that he could stand the horror in the darkness for so long．Even more surprising was his 　　6　　, “First of all I checked up on my physical 　　7　　 and found myself not in fatal(致命的)danger．Finding no 　　8　　 to call for help, I leaned back to try my best to keep the wound from 　　9　　．In this way I fell asleep．

　　This 　　10　　 me of another story：A group of young men 　　11　　 to explore a mountain cave and got lost．　　12　　 to find a way out in the dark cave they were 　　13　　 and ran anxiously without a sense of 　　14　　．Finally they fell dead in fear and exhaustion．According to the 　　15　　 people that found them, the place where they got lost was only about 10 meters away from the 　　16　　 of the cave．If they stayed where they got lost and tried to 　　17　　 themselves, they would probably 　　18　　 a small light glimmering(闪烁)not far away．

　　We can compare it with our 　　19　　 itself．Sometimes when we meet with difficulties in life, we feel lost in the darkness．If it is unclear, you needn’t put up a struggle 　　20　　．Remember：CALM DOWN!