Why people lack of trust nowadays ?

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I went out to buy a e-dictonary for my cousin.It was too early ,so I wandered around pc counters. I don't know why I am so facsinated about computer. HP laptop was very beautiful and pratical.Then I went into a counter to take a look at display equipment. I chatted with a shop assisant for a while. I said I had no confidence in home products. Because Greatwall display was broken ,and I had to buy a new one .Terrible. At last ,I told him I need to take a look at more products,then I can decide to buy which display ,but he didnot believe in me. He started to down the price gradually .As a matter of fact ,I had not decide to buy the display ,for I would graduate from college in half of year.Then I would like to buy a laptop .On the way home ,I came cross two girls ,suddenly they stopped me. I felt very uneasy and puzzled about their behavior. One girl asked me how to back ,I told them .They were very happy ,and thanks me .