题目内容：

阅读下面材料，在空白处填入适当的内容（每空不多于3个单词）或括号内单词的正确形式。

China's Tea Villages

In most Chinese tea villages, March is the time of year in ___1.___ locals start to pick and process tea. The usually quiet villages suddenly become busy centers of activity, as people take out special tools and prepare ___2.___ tea processing. In some villages, local residents hold traditional ceremonies, __3.___ (thank) heaven for its blessing. The price of tea ___4.___ (pick) in March is extremely high because __5.___ is fresh, tender and contains multiple trace elements.

China ___6.___ (be) famous for tea production since ancient times. Of the goods transported and traded along __7.___ Old Silk Road linking China to the Middle East and Europe, the importance of tea was matched only by silk. China produces Oolong, black, green, white, yellow __8.___ dark (aka post-fermented) tea. The Oolong, green and black __9.___ (vary)are most notable for their high quality.

Most of China's tea villages are found in remote mountainous areas in the country's south and southwest, __10.___ the beautiful scenery is often hidden under clouds.