II.Mỗi câu có một lỗi sai. Hãy viết lại cho đúng
1.If we drop litter on a beach, we could see it on another beach
2.Unless we protect the rainforest there aren't enough oxygen.
3.if we protect endangered species, most of them will become extinct.
4.If we destroy the ozone layer, nothing sacves us from the ultra-violet rays.
5. What will happens to the Earth if the global temperatur rises?
6.Daisy will buy a new dress if she doesn't have enough money.
7. If the sea gets warmer, the ice at the South pole would melt.
8.If the weather is not fine, we will go for a picnic