肥大性龈炎时龈沟加深形成A．龈袋 B．骨上袋 C．牙周袋 D．骨内袋 E．复杂袋

阅读理解。

    In most parts of the world, many students help their school make less pollution. They join in

"environment (环境) clubs". In an environment club, people work together to make our environment clean.

    Here are the things students often do.

    Turn off the water! Do you know that some toilets can waste (浪费) twenty to forty tons of water an

hour?

    In a year, that would fill a small river! In environment clubs, students mend those broken toilets.

    No-car day. On a no-car day, nobody comes to school in a car-not the students and not the teachers!

Cars give pollution to our air, so remember:

    Walk, jump, bike or run.

    Use your legs! It' lots of fun!

    No-garbage (垃圾) lunches. How much do you throw away after lunch? Environment clubs ask students

to bring their lunches in bags that can be used again. Every week they will choose the classes that make the

least garbage and report them to the whole school!

    We love our environment. Let' work together to make it clean!

1 Environment clubs ask students            .

A. to run to school every day

B. to play sports every day

C. not to throw away lunch bags

D. not to forget to take cars

2 From this passage we know the students usually have lunch            .

A. at school

B. in shops

C. in clubs

D. at home

3.  On a no-car day,   _____ will take a car to school.

A. both students and teachers

B. only students

C. neither students nor the teachers

D. only teachers

4. After mending the broken toilets, they save  _____   .

A. a small river

B. a club

C. a lot of water

D. a toilet

肝细胞的功能，除外（）。

A.合成胆汁

B.合成血浆蛋白

C.生物转化

D.解毒功能

E.清除抗原

在四大名著中，《三国演义》的作者是( )。

A．罗贯中

B．曹雪芹

C．吴承恩

D．施耐庵

我国目前毒品问题的性质是什么？

肇庆的哪个村被誉为“中国民间古法造纸第一村”？