1 . But after assessing ______ number of extant pandas in the late 1970s, China came to realize the fact that the animals had become a rare and endangered species. (用适当的词填空)

2 . By _______ nature, you are an adventurer, full of amazement and curiosity about _______world bigger than life itself. (用适当的词填空)

3 . The image of the fisherman on the back of the 20-yuan banknote is not just about one man, but instead stands on its own as ______ unique cultural symbol of the Lijiang River. (用适当的词填空)

4 . According to Zhao Hao, a Peking University archaeologist in charge of the pit that contained ________ object, all other bronze animals uncovered at the site in the 1980s measured around 20 to 30cm. But this one is very large in size, with height and width both measuring about one metre. (用适当的词填空)

6 . Start of Autumn reflects the end of summer and the beginning of autumn. Although autumn just begins, hot weather will not come to ______ end. (用适当的词填空)

8 . It was historically responsible for protecting the palace. The complex layout of the turret posed ______ unprecedented (史无前例的) technical challenge for Zhang and his team of designers and developers. (用适当的词填空)

10 . After he passed the imperial civil service exams and became _______ official, Wang wanted to change their conditions and initiated a series of reforms. (用适当的词填空)