吸烟有害健康，现在越来越多的人加入了戒烟的行列，但是中学生中吸烟的现象日趋严重，请就吸烟有害写一篇短文，从以下几个方面阐述吸烟的危害性。（词数：150左右）

1．你所在的学校中出现了中学生吸烟者;

2．吸烟对呼吸系统（respiratory system），心血管（blood vessels of heart）和肺十分有害。吸烟者肺癌发病率是不吸烟者的4倍;

3．吸烟对于身体处于发育阶段的青少年危害更大，而且还危害不吸烟人的健康;

4． 吸烟可以引发火灾。

--Did you remember to pay the telephone bill?

--The telephone bill ? __________
A. That isn't due yet.                　　 B. Are you sure ?
C. My telephone is out of order.       D. Please remember the amount.

he girl looked at me with a ______expression. Maybe the problem was quite _____.

A. puzzled; puzzling 　 　　　　B. puzzling; puzzled

C. puzzled; puzzled 　　 　　　　D. puzzling; puzzling

If I were in a movie, then it would be about time that I ___ my head in my hands for a cry.

A. bury　 B. am burying　　 C. buried　 D. would bury

The car was stopped by highway man, while ______ through a forest.

A. was passing 　 B. passed　　 C. passing 　 D. pass

Yesterday a bomb e _____ in the center of the city.

Is this research center _________ you met some foreign guests last week?

　 A. that　　　　　 B. where　　　　 C. which　　　　 D. in which

When you listen to people talk or read something without a title , try to invent 　　　　 __________ title that summarizes 　　　　 main idea .

　 A．the ; a 　　 B．the ; the 　 C．a ; a 　　　 D．a ; the

All these animals are________and they can communicate with each other.

A．of a high intelligence B．of high intelligence

C．of high intelligences D．of highly intelligence

The central government is sparing no efforts to ____ the officials’ overuse of power to make up a healthier Party.

A、keep off　 B、keep down C、keep out　 D、keep on