【单选题】—Have your read the article A Dirty Beijing, which is about air pollution? —Yes. It’s highly informative. I _____no idea that the PM2.5 there sometimes reached 300.
【简答题】C. Translate the following sentences into English using the words or phrases you have learned in this unit. 1. 那个地方的人对保护环境没有给予足够的关注。 (inadequate) 2. 政府要求关闭那家工厂以确保这一旅游胜地不受污染。 (make sure that) 3. 他们尽可能避...