giải giúp mình với :)
----- Nội dung dịch tự động từ ảnh -----
6 The air quality in cities would have improved if there was / had been a reduction of greenhouse gases.
7 Providing we protect our dwindling fish stocks, they will be / would be overfished.
8 If you switch / switched off all your lights, you would conserve electricity.
9 If the huge meteor hadn't hit / will hit Earth, the dinosaurs might have survived.
10 We can't install solar panels on our roof unless we would find / find the money to invest in them.