1 . 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。
Xiechi Lake, also known as Yuncheng Salt Lake in China’s Shanxi Province, 1 (become) popular on social media websites in the past few years.
Now, China wants to transform that online 2 (popular) into real-life tourism. “As the Chinese ‘Dead Sea’, floating here is 3 unforgettable experience, and one you can’t find anywhere else,” reads a tourism advertisement 4 (sponsor) by the Yuncheng Salt Lake Tourism Development Company. Yuncheng Salt Lake is a sulfate (硫酸盐) lake. “If the sulfate in your water is greater than the calcium (钙), all the calcium is used up, 5 leaves you with large amounts of sulfate and you have a sulfate lake,” explains geography professor Bernie Owen. Xiechi is also a “closed basin” lake, 6 (mean) it doesn’t flow out to a river or ocean, which explains how its salt content stays so high. It is possible for salt lakes to freeze over, although not as 7 (quick) as other lakes — after all, think about what happens when we spread salt over icy roads. Saltwater freezes at 8 (low) temperatures than fresh water.
In an effort 9 (boost) Xiechi Lake’s international profile, China is reportedly taking steps to get it recognized 10 a UNESCO World Heritage site.