2 . 我们发现难以弄清楚他们在哪里。(figure out)(汉译英)

4 . ________(每逢一个节日即将来临), you will see various businesses taking advantage of social media to sell their products. (根据汉语提示完成句子)

5 . The historic building ________(destroy)by fire in the past two years. (所给词的适当形式填空)

6 . ________ indicate that risk-taking maybe part of human nature.
近期的研究表明冒险是人类天性的一部分。

7 . The Tang emperors were very________ horses.
唐代的帝王们非常喜爱马。

8 . The insight grew from the determined attitude of a 6-year-oldboy who had the courage and perseverance to________.
这个远见来自于一个6岁男孩的坚韧的态度，他有勇气和毂力让他的梦想成为了现实。