Question

6. It’s a good idea to switch off electrical appliances when they aren’t in use.

-> You………………………..

7. Although coal is the most polluting of fossil fuels, it is still the largest sources of energy worldwide.

-> However……………………………..

9. This is our school.

àThis school is ……………………………..………………………………….…

Answer 1

6 You should switch off electrical appliances when you aren't in use
7 Howerver coal is the most polluting of fossil fuels, it is still the largest sources of energy worldwide .
9 This school is ours
 

Answer 2

6.You should switch off electrical appliances when they aren't in use.

7.However polluting coal may be,it still remains the largest source of ebergy worldwide.

8.This school is our school.