Преобразовать из предложений первый или второй conditional

6. If people explore space , we`ll know much about stars and planets.

7. If these people  take  care of the environment, they don`t drop litter everywhere.

8. If Tom didn`t forget that it was Sunday, he wouldn`t get up early.

9. If I knew your telephone number , I would call you .

10. If Alex trained hard last month, he would win the game.

11.If forests weren`t cut down in the past,many species of animals and birds  wouldn`t be destroyed.

12.If I knew about recycling ,I wouldn`t throw  away  a lot of rubbish.

Объяснение: