Every mobile phone has a ringtone(铃声). It tells you that someone is calling you. Now, there  _ a ringtone called “mosquito tone(蚊子铃声)”. Mosquito tone has a special . Only children and teenagers can hear it. Using it, students can receive calls and text messages in class the teacher will not realize what is happening. However, it also has a bad influence on their study if students use it in class. “Not all the students are in mosquito tone.” Jerry Jones, a high school student of 17, says, “Using mosquito tone too often is bad for our hearing. I may use it for , but not in class 小题1: A．be B．will be C．is D．was 小题2: A．sound B．voice C．noise D．music 小题3: A．and B．or C．then D．but 小题4: A．interest B．interested C．interests D．interesting 小题5: A．pleased B．pleasant C．pleasure D．please