All the _______ things need air and water. Without air or water, nothing can stay _______.
A. living; living B. living; alive
C. alive; alive D. alive; living
I don’t know if I _______ free tomorrow. If I _______, I will go to the bookstore.
A. am; am B. will be; will be
C. will be; am D. am; will be
Someone is knocking at the door. It _______ my mother. It’s time for her to be back.
A. can be B. may not be
C. must be D. mustn’t be
The floor is so wet. Let’s _______.
A. stop mopping it up B. stop to mop up it
C. stop mopping up it D. stop to mop it up
The flood in 1998 washed lots of houses _______ and lots of people _______.
A. on; died B. off; die
C. away; die D. away; died
书面表达
近年来雾霾天气（haze）越来越严重。请就此话题写一篇80词左右的短文。
内容提示：
1. 因为雾霾天气，学生的户外活动比以前少了；
2. 人们不得不戴面罩（mask）出行, 道路上也发生了更多交通事故；
3. 空气污染问题严重，不利于健康；
4. 每个人都应该采取措施来保护环境。例如……
注意：
1. 短文须包括所有要点，不必逐句翻译，要求语句通顺、意思连贯；
2. 第4个要点的内容须适当发挥；
3. 短文开头已给出，不计入总词数。
These years the haze weather appears more and more often. _____________________
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