In many high schools，there are strict rules about using mobile phones. If your phone rings in class，for example，the teacher will be very angry.
Every mobile phone has a ringtone (铃声). It tells you that someone is calling you. Now，there is a ringtone called “mosquitotone (蚊子铃声)”. Using it，students can receive calls and text messages (短信) in class but the teacher will not realize what is happening. How?
Mosquitotone has a special sound. Only children and teenagers can hear it. As we get older，we are unable to hear some sounds with high frequencies (频率). As a result，a child or teenager can hear the mosquitotone ringtone, but it’s_inaudible_to someone 20 or older.
But sometimes，people over 20 can hear the ringtone. One British student’s phone uses mosquitotone. In class，the student’s phone rang. The 32­year­old teacher looked at the student and became unhappy. “I heard that. You know the rule：no mobile phone in class.”
Not all the students are interested in mosquitotone. Jerry Jones，a high school student of 17，says，“Using mosquitotone too often is bad for our hearing. I may use it for pleasure，but not in class. It’s unfair to the teachers！”
What do parents think of mosquitotone？“I think it is perfect for places like movie theaters，” says Connie Neeson,44.“Think about it. Yon’re watching a film and someone’s mobile phone rings. Mosquitotone is good because many people don’t hear it. However，it also has a bad influence on their study if students use it in class.”
【小题1】Mosquitotone works because ________.

根据中文提示以及句意填空，每空填一词
【小题1】Mr. Wu spent a lot of time___▲___（解释）why he was late.
【小题2】A j _        high school is for students between 13 and 15 years old.
【小题3】We have ___▲___（更新鲜的）air in the country than in the city.
【小题4】My teaching style is ___▲___（相似）to that of most other teachers.
【小题5】He was used to ______▲______（get）up late.
【小题6】He __▲___ (意识到) that he left his homework at home when he got to school.
【小题7】We__▲___ (拍)our hands when the headmaster finished his talk.
【小题8】He jumped with__▲___ (激动) when he heard the news.
【小题9】---How is Miss King?   ---She is still under ___▲___（治疗）in hospital.
【小题10】English Classroom is an ___▲_____(education) program on CCTV.

根据句意，用括号中所给单词的正确形式填空。

1.The boy is very rude so he is _________ (popular) with his classmates.

2.The brave boy was in hospital and many ________ (visit) came to see him.

3.The father makes his son ________ (clean) his own bedroom every day.

4.When autumn comes, ________ (leaf) begin to fall off the tree.

5.It’s raining very hard so I decide _________ (not go) out.

6.It’s necessary for us _________ (keep) the classroom clean.

7.There was a lot of traffic on the way, but ________ (lucky), we didn’t miss the film.

8. Yesterday morning, Zhang Ming was late for class because of ________ (get) up late.

 —Why are you so frustrated, Ben?

    —I was late for class again. I’m afraid Miss Li will be _________ me.

   A. busy with         B. angry with       C. friendly to         D. proud of