1 . I am looking forward to ________________ (给予机会) to participate in the activity. (give) (根据汉语提示完成句子)

2 . _____________   different languages and cultures is of great benefit to children. (expose)
接触不同的语言和文化对孩子们大有裨益。

3 . Some experts recommend signs and posters be put up in areas                 . (allow)
一些专家建议应在不允许抽烟的地方贴上标志和海报。

4 . 假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加:在缺词处加一个漏字符号(∧)，并在下面写出该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错的词下划一横线，并在该词下面写出修改后的词。
注意:1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者(从第11处起)不计分。
I am very excited to tell you that I won the first prize in the English speech contest holding last Saturday. With your help, I would not have made such a great progress in my spoken English. In order to return for your kindness, I am writing to invite you to watch a wonderfully performance of Chinese Kung Fu.
The performance is scheduled to be started from 7:00 pm to 9:30 am in June 15th in our school’s lecture hall. Several styles, included Shaolinquan, Tai Chi and Qigong, will be shown. Nowadays, Chinese Kung Fu is regarded a traditional sport gaining more and more popular and even stands as a representative for Chinese culture. This traditional heritage have left far-reaching influence on the Chinese lifestyle. After watching the show, you will definitely feel the charm of Chinese Kung Fu but I have the confidence that you will be fond of it.

5 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

During the     1     (twenty) century , the temperature of the earth     2     (rise) about one degree Fahrenheit. It is a rapid increase when compared    3     other natural changes .

There is no doubt    4    the earth is becoming warmer. Scientists believe     5     is human activity that has caused this global warming. The increase in the earth's temperature is due to the    6     (burn) of fossil fuels. Some byproducts of this process     7     (call) “greenhouse” gases, the most important one of    8    is carbon dioxide. Without the “greenhouse effect”, the earth would be thirty-three degree Celsius    9     (cool) than it is. So, we need those gases. The problem begins when we add huge quantities of extra carbon dioxide into the atmosphere, causing the global temperature     10     (go) up.