完形填空。（每小题2分，共20分） 根据短文内容，从A、B、C、D四个选项中选出一个能填入相应空格内的最佳答案，并把机读卡上对应题目的答案标号涂黑。 More and more students are using mobile phones at school now. Some mobile phones arejust phones—they are being used as radios,cameras and MP5 players, and they are alsoto send e-mails or surf the Internet. Some of them can even be used as mini computers. People haveideas about whether students can use mobile phones at school or not. Some people think that students don’t reallymobile phones. If their parents have somethingto tell them, they can ask their teachers for help. If someone’s mobile phone rings during a Chinese class, he and his classmates can’twhat the teacher is saying. Some parents also say that their childrenuse their mobile phones to download(下载)information from the Internet. They are really worried about this. But other people believe we can find someto use mobile phones to improve students’in learning, since many of today’s mobile phones are like mini computers. And children usually know more than adults when it comes to use mobile phones.