氮气是一种（）气体。

A.可燃性

B.窒息性

C.挥发性

D.有毒

书面表达。

阅读下面一则广告,按照要求完成写作任务.

ETL International English Summer Camp

Volunteer Wanted

EIL was funded in Britain in 1936 with the fundamental aim of international understanding"Learn to live together by living together".

Requirements: Over 16; good knowledge of English; outgoing; working well with children between 7-12

Activities; Language study, outdoor recreation and travel

Campers; Students from different countries

Camp site; Mount Wuyi, Fujian

Time: July 26-August 9

Application deadline; July 15,2008

If interested, please e-mail to info@eiuk.org

[写作内容]假设你是李华,这则广告引起了你的兴趣,请用英文写一封自荐信.

要点如下:

1.对夏令营主题的理解；

2.根据招聘要求自我介绍；

3.参加夏令营的目的.

注意:

1.信的开头和结尾已为你写好,不计入总词数；

2.词数120左右.

Dear Sir,

     I'm Li Hua from Fujian.                                                                                                                 

     I am looking forward to your early reply.

                                                                                                Sincerely yours,

                                                                                                       Li Hua