Thank you ________ your e-mail.

A．of               B．at                C．for               D．in

He is the tallest __________ the three.

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.”

1.Mosquitotone works because ________.

A. it is very loud                  B. it has no sound

C. it has a beautiful sound         D. it uses high frequencies

2.The under lined part “it’s_inaudible_to” means “________”．

A. it can’t be seen by             B. it can’t be heard by

C. it isn’t popular with           D. it isn’t healthy for

3.The 32­year­old teacher felt unhappy because the student ________.

A. was late for class  B. didn’t do his homework

C. couldn’t answer her question          D. was using a mobile phone in class

4.Connie Neeson thinks that mosquitotone ________.

A. has no bad influence             B. is unfair to the teachers

C. has its advantage and disadvantage  D. can’t be used in any public place

For many school in Thailand, there are two terms. The first term is from the first week of May to the first week of October. The second term starts from the first week of November and finishes at the last week of February or the first week of March. The students don't get a break for Christmas（圣诞节）. But they get a 3-4 days' break for the New Year.
For many students, a school day is very long. They usually get to school at 7:30 a.m. Classes begin at 8:00 a.m. there are three classes in the morning and they are 50 minutes each（每个）. Students have lunch at 11:00 a.m. they don't have dining halls so they have to eat in the classroom. Lunch time finishes at 12:25 p.m. there are three classes in the afternoon. School finishes at 3:15 p.m. many schools have a "homework" lesson after school, so students usually go home after 4:45 p.m.
【小题1】How long is the first term in Thailand schools?