complete each sentence with an appropriate preposition
1.You can buy reusable shoppping bags_________the check-out
2.The three Rs stand________ Reduce,Reuse and Reycle
3.These shopping bags are made_________natural materials
4.Don't throw old things_______.Try to find another use for them
5.You should turn the tap_______when you brush your teeth
6.You shouldn't wrap the food_______a plastic bag
7.Give your old clothes_________charity
8.You should swap your clothes________your friends or cousins
put the verbs in brackets into the correct form
1.We ______(save)thousands of trees if we _____(keep)polluting the environment
2.What _______(happen) if we _________(not waster)so much paper
3.If we ________(not stop)cutting down so many trees,we_________(endanger)our oxygen supply
4.If people _______(dump)chemicals into rivers,they_________(not be) able to swim in the future
put the verbs in brackets into the corect form
1.We ________(stay)at home if it rains
2.She will call you if she______(have) tỉme
3.If it ______(not rain)tomorrow,we will go for a picnic
4.If everyone _______(recycle)paper,metal and glass,we_______(not produce)so much rubbish
5.If you _______(not water) plants,they ______(die)
6.If the weathr _______(be) bad,we_________(not go)to the park