短文改错。
Mobile phones are being more wide used. They're light in weight and easy to carry, offer fast and
convenient service for communication. The users use them for making phone call, sending short messages
and Internet-surfing. In recently years, mobile phones have become popular to middle school students.
Quite a few use it to keep in touch with their families and friends, what, of course, was of great
convenience. However, I don't think it's good to do so. In spite of the advantages mentioned above, student
users often waste a lot of time chat on the phone in their spare time. Some even cheat in exams. In addition,
mobile phone bills spend their parents lots of money.
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