五、根据短文内容，在文中空白处填入1个适当的单词，或用括号内所给单词的正确形式填空。
Air pollution is a big problem in many cities and towns these days. More cars on the road and factories make the air dirtier little by little. On bad days, the sky looks gray and we can’t see far away when we go outside. People start to care about this issue
1 it has much to do with our health. We can do simple things
2 (help), like planting more trees, walking or riding bikes for short trips.
Many cars and factories produce harmful gases that make the air
3 (bad). The gases
4 (stay) in the air and are not good for living things.
5 (cut) down on the gases, some cities add more public buses for people to take.
6 (family) also try to drive less and choose greener ways to go out. Every small effort can help make the air
7 bit cleaner.
When the air is dirty, many people, especially kids and old people, often cough. This
8 (comfortable) feeling tells us we need to clean the air right now. Dirty air can also affect our daily life, making us not want to play sport outside. If we all work together, we can change the situation. We can tell our family and friends to join
9 the activities of cleaning the air. Let’s keep
10 (do) small things, and we will soon breathe fresher air.
1.
because
2.
to help
3.
worse
4.
stay
5.
To cut
6.
Families
7.
a
8.
uncomfortable
9.
in
10.
doing
