First Conditional

If the weather (not improve) , we (not go) for a walk.

If she (not/go) to bed early, she (not wake up) in time.

We _______________ any tickets for the performance unless we _______________ them in advance. (NOT GET, BUY) 

If it still _______________ tomorrow, I _______________ to work. (RAIN, NOT GO)

If he goes to Dan's birthday party, he _________________ a present (BUY)

She _________________ him if she loves him enough. (MARRY) 

Choose the correct variant

 More species ... (to survive) if we ... (to protect) nature.

If there.... a rubbish everywhere, it will be dangerous for wild animals.

If factories_____________so much plastic, there __________ less rubbish.

Many species _____ (disappear) if we ______(not protect) endangered animals and plants.

You_____( to be) healthy if you____(not to eat) junk food.

If we ______ (to recycle) papers we ______ (to save) many trees.