Conditionals Open the brackets using the verbs in the proper form!
1. If we …. (to use) bikes instead of cars, the level of air pollution …(to decrease).
2. If the sun …. (to shine), we …. (to go) on picnic.
3. If he …(to plant) at least a tree, he… (to help) our environment.
4. If my friends … (to come), I ….(to be) very happy.
5. If she … (to earn) a lot of money, she… (to fly) to New York.