A．Going down. B．Going up.

　　C．Coming from. D．Taking up.

　　解析：选A　词义猜测题。根据第四段最后的"has also been falling by 1,284 square kilometres a year"可知，该词的意思是"减少"，与fall的意思接近，故选A项。

　　6．Where do most of the sandstorms in China come from?

　　A．The northwestern Chinese regions.

　　B．The northern Chinese regions.

　　C．The western part of China.

　　D．Foreign countries.

　　解析：选D　细节理解题。根据第一段提到"Most of the sandstorms that ... control said on Monday."去年袭击中国的沙尘暴来自外国，故选D项。

　　7．Which of the following is believed to be the sand source to northeast Asia?

　　A．Mongolia. B．Africa.

　　C．China. D．Australia.

　　解析：选C　细节理解题。根据第三段"China also suffers from sandstorms ... sand source to northeast Asia"可知中国被认为是东北亚风沙的来源地，故选C项。

　　8．What can we infer from this passage?

　　A．The land in China suffering from desertification has been increasing greatly.

　　B．China has made achievements in its own desertification control.

　　C．The desertification land makes up nearly half of China's territory.

　　D．Little progress has been made in controlling desertification in China.

　　解析：选B　推理判断题。根据第四段提到"The land suffering from ... falling by 1,284 square kilometres a year."遭受风沙袭击的土地每年减少7 585平方公里，沙地的区域每年减少了1 284平方公里，故可知控制沙漠化取得了成效，故选B项。

　　C

　　Welcome to the Barossa Valley Balloon Adventures website. We hope you find it helpful and easy to use.

　　Balloon Adventures has been a family owned and operated business since 1986. We have flown thousands of very happy people of all ages over the years.

We have a highly experienced team with your safety and enjoyment as our primary concern. Your experience starts when we meet you at the winery (酿酒厂) on the edge of Tanunda, one and a half hours before sunrise. From there our team checks the wind conditions and then chooses the best launch site for the day. We have about 17 different sites throughout the country to choose from.