1, If you work hard, you will succeed.
2, If you don’t get up early, you will be late for school.
3, You will speak English fluently if you practice it every day.
4, Our sources of energy will end soon if we don’t try to save them.
5, If you use less paper, you will save a lot of trees in forests.
6, If it is sunny next week, we will plant more vegetables in the front garden.
7, There would be more fish if the river weren’t dirty.
8, We will save a lot of trees if we don’t waste so much paper.
9, If we keep the environment clean, we will live a happy and healthier life.
10, The environment will become seriously polluted if we go on littering.
