“三北”防护林是我国在____北、____北和____北建设的一项规模空前的生态工程，被誉为“____建设工程”。目前已累计造林两千多万公顷，相当于全球人工造林面积的____。

听下面一段独白，请根据所听内容回答四个问题。

On his _________ from Australia we gave him a welcome party. 

    As we know，there     1 four seasons in China . It's    2   in spring（春）, hot in   3    , cool in autumn(秋) and cold in    4   . My   5  season is winter. Sometimes it snows（下雪）. Everything is all white. The world    6   clean and fresh(新鲜). I can go skating then.
    But Kitty likes summer    7  than winter. She says summer is   8     for sports. She can go  9   ,  sometimes in a lake and sometimes in a river. She   10 it very much .