单选题 .  If American children have to use mosquito ringtone (静音) of cell phones at school, a university in Japan is doing the opposite: giving cell phones to students. And not just any cell phone—the iPhone 3G.
    According to Asiajin, about 550 students and staff members in the School of Social Informatics at Tokyo-based university Aoyama Gakuin received the iPhone 3G for free as part of their study materials.
    This is the result of a deal that Aoyama Gakuin signed with SoftBank, the only sales representative of the iPhone in Japan. The number of students using the iPhone is expected to reach about 1,000. This is the first time a particular cell phone has been used on such a huge scale at a Japanese university.
    The phone will work as a study tool for students. As it comes with the global positioning system (GPS), the university plans to use it to check student attendance. Dropping classes is a big problem in Japan, where regular attendance is an important factor in determining a student's grade. Students often fake attendance by getting classmates to answer roll calls.
    Now, with the iPhone 3G, the school plans to keep better tabs on (监控) its students. Students are allowed to use the phone for attendance reporting (but only if they are actually in the classroom, a fact that will be proved by the phone's GPS), lecture podcasting, and online examinations. A student can't answer the roll call using the phone from any location other than the classroom.
    Students can, of course, still cheat the new system by leaving their phones with fellow classmates, but this is not very likely to happen, as people tend to keep a lot of private information on their phones that they don't want to share with others.
    As for calling and data plans, the university covers the basic fee. The hardware itself is free, but students will have to pay when they exceed downloading limits.1.  According to the passage, American children are ______ at school.