The rivers will become dirtier and dirtier _______ we take action to protect them.
A. since B. if C. until D. Unless
--I’m a little hungry, Mum.
--There are some cakes on the plate. You can take _______.
A. it B. one C. that D. This
--Would you like some tea, please?
--Yes, and I prefer tea _______ some sugar.
A. to B. for C. with D. From
--The man in a black suit _______ be our youth worker.
-- I’m sure it _____ be him. I saw him in the laboratory building some minutes ago.
A. must; can’t B. can; mustn’t C. can; could D. must; won’t
To find ___ better job, she decided to learn ___ second foreign language.
A. a; a B. a; the C. the; a D. the; the
随着扬州经济的发展，私家车的数量不断攀升，同时我们的空气污染越发严重。去年冬天雾霾（the thick haze）天气接二连三出现，生活环境日趋恶化。就此，你班展开讨论美丽扬州应该从何做起。请根据下面提示写一篇短文，向报社投稿。
扬州现状 | 美丽扬州从我做起 | 未来展望 |
车辆越来越多 空气越来越差 …… | 出门做公交 …… …… | 水更清，天更蓝 …… …… |
要求：1）表达清楚，语法正确，上下连贯；
2）必须包括所有相关信息，并作适当发挥；
3）词数：100词左右（开头已给出，不计入总词数）；
4）不得使用真实姓名、校名和地名。
