题目内容：
根据短文内容，回答题。Not long ago, I had my first on-line chat. I thought it would be___ 51____ because I have heard so many people describe it in that way. But it was, disappointingly, quite an unpleasant ___52.____
On line I met a man ___53____ said he was a manager in a big company in Dalian. We chatted pleasantly first, then exchanged e-mail adresses in order to keep in touch in the future. ___54____ , he sent me an e-mail. When I opened it, I found, to my surprise, a detailed(详细的) self-introduction including age, ___55____ , weight, habits and future plans. It was an advertisement for a dating(约会) service! I was hurt ___56____ felt rather angry.
When I told a veteran (有经验的) Internet surfer( 网名 ) of my experience, he said it was not uncommon. I was ___57____ The Web provides such a nice, large place to make friends, why do some people ___58____ it?
The relationship between one another should be mutual(互助的) politeness and respect. On-line we can' t see one another' s physical form, but we are talking through our ___59____ . Such tricks as the one I met are not polite at all.
Since the Web belongs to everyone, every user has a duty to keep a friendly and polite atmos-pbere(氛围). We need ___60____ honesty and respect on-line.
_______ A．exciting
B．disappointing
C．surprising
D．frightening
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