1 . Hundreds of thousands of volunteers are working hard to deal with the environmental pollution, change the world and make it a better place to live ________. (用适当的词填空)

2 . Students in this class, along with their math teacher, ________________ (独领风骚) in the field of math at present. (根据汉语提示完成句子)

3 . 我们出去还是待在寝室取决于天气。
________ depends on the weather.

4 . They did not have enough staff, and the laboratory ________ which they worked had poor air quality. (用适当的词填空)

5 . 他们被困在燃烧着的楼房里。
They _______________the burning building.

6 . To my surprise, he is a graduate _________ medicine. (用适当的词填空)

7 . 他第一次在罗马旅行时，并没有太关注文艺复兴(Renaissance)时期的雕塑。(The first time)(汉译英)

8 . 他住在一个窗户面朝北的房间里。(whose引导定语从句) (汉译英)

9 . 只有一个老师和三个学生在实验室里。
Nobody but one teacher and three students ______ ______ the laboratory.