阅读下面短文，根据以下提示：1）汉语提示；2）首字母提示；3）语境提示，在每个空格内填入一个适当的英语单词，并将该单词完整地写在右边相对应的横线上。所填单词要求意思准确、拼写正确。
Many Americans have found the cell phone valuable in providing help in emergencies and free time entertainment. M________，it has also brought up p________ in careless driving, irritating behaviors in public and high expenses.
Cell phones are also________ (流行的) in China, and many students own them. The question is ________ students should be allowed to use them at school. Some parents support it just for the need to communicate with their children, w________ some others think it a bad idea, worrying that it will disturb usual educational________ (环境).
In my opinion, ________ is not that necessary for us to have cell phones in school. Busy with studies and afterclass ________ (活动), we do not have much time to call others. ________，it is true that parents and students have a need to talk to each other from time to time. I suggest schools provide more pay phones on campus so that parents and students can have easier access________ each other.