If I ___________ (drink) too much water, I __________ (go) to the bathroom a lot of times
If people ______ (throw) rubbish in the river, the fish ______ (die)
If deforestation _________ (continue), there ________ (be) less soil
If you __________ (go) to sleep late, you ________ (be) tired tomorrow
If it _______ (be) rainy, I _____________ (not go) to the beach.
My teacher _________ (be) happy if we _________ (do) our homework.
If I ____________ (forget) my friend's birthday, she _______ (not be) happy.
If people burn rubbish, the air will/won't be dirty
If we use/don't use bicycles, we will reduce pollution.
If you __________ (study) a lot, you ____________ (pass) the exam.
Hundreds of species of plants and animals _________ (not survive) if we ________ (destroy) their habitats