Complete the sentences with the correct prepositions. 6. Leave our electric appliances..................when they are not.........use is a bad habit. 7. It takes many years...........plastic waste to break down.............small pieces. 8. Both students and local people take part..............the event to pick up rubbish.........the central maket. 9. We should set..........more rubbish bins.............public places to keep the environment clean and safe............everyone.

`6` on

- live sth on : không tắt đi thứ gì

- (not) in use : (không) dùng

`7` to - into 

- It takes time to do sth : mất bao lâu để làm gì

- break down into pieces : chia thành nhiều mảnh 

`8` in - in

- take part in : tham gia vào 

- in + địa điểm rộng lớn

`9` set - for

- set up : thành lập

- keep sth adj for sb : giữ thứ gì như thế nào cho ai

6Leave our electric appliances off when they are not in use is a bad habit.

7It takes many years for plastic waste to break down into small pieces.

8Both students and local people take part in the event to pick up rubbish at the central market.

9We should set up more rubbish bins in public places to keep the environment clean and safe for everyone.