Anoptimisticattitudeisnotaluxury；it'sanecessity．Thewayyoulookatlifewilldeterminehowyou（1）___，howyouperform，andhowwellyouwillgetalongwithotherpeople．（2）___，pessimismcreatesasadandhopelessplacewh

　　An optimistic attitude is not a luxury； it's a necessity．The way you look at life will determine how you （1）___，how you perform，and how well you will get along with other people．（2）___，pessimism creates a sad and hopeless place where no one wants to live．

　　（3）___thoughts，attitudes，and expectations feed on themselves．

　　Years ago，I（4）___ into a service station to get some gas．It was a（5）___ day，and I was feeling great．As I walked into the station to pay for the gas，the attendant said to me，"You don't look well．"This took me completely by（6）___．A little less confidently，I told him that I had never felt better．Without hesitation，he continued to tell me how bad I looked and that my skin appeared（7）___．

　　By the time I left the service station，I was feeling a little（8）___．About a block away，I pulled over to the side of the road to look at my face in the mirror．How did I feel？Did I look that（9）___？Was everything all right？By the time I got home，I was beginning to feel a little（10）___．Had I picked up some rare disease？

　　The next time I went into that gas station，feeling（11）___ again，I figured out what had happened．The place had recently been painted a bright but disgusting yellow，and the light reflecting off the walls made everyone inside（12）___ as though they had hepatitis（肝炎）!I wondered how many other folks had reacted the way I did．I had let one short（13）___ with a total stranger change my（14）___ for an entire day．He told me I looked sick，and before long，I was actually feeling sick．That single negative observation had a（n）（15）___effect on the way I felt and acted．

　　1．A．learnB．exerciseC．behaveD．feel2．A．CertainlyB．AdditionallyC．ContrarilyD．Actually3．A．NegativeB．ImpracticalC．SensitiveD．Indifferent4．A．droveB．walkedC．rushedD．ran