8．There is no doubt that cellphones plays an important part（78）inour daily life．According to survey，about 75percent of （79）teenagers（青少年） have their own cellphones．It's true that cellphones make people get in touch with each other more e（80）easily．We can even use cellphones for （81）listening to music，watching movies and searching for the information in our spare time．But each coin has two （82）sides（面）．U（83）sing mobile phones in the wrong way will do serious harm to us．First，many students are made to spend much money （84）on QQ coins by cellphones．It（85）wastes（浪费） them a lot time and money．Second，some students lose themselves in p（86）laying with cellphones after school so that they often forget to finish their homework．Third，a few students use cellphones to（87）cheat （作弊）in the exams．From my point of view，students ought to make good use of cellphones．We should use cellphones properly in order to make them serve us better．
一、按顺序写出26个字母的大小写．（8分）