Complete the sentences using the correct form of each verb in parentheses.

1.
If you (not / wash)
your hands, you (get)
sick.

2.
There (be)
more water for future generations if people (save)
it today.

3.
If there (be)
more whales, the oceans (be)
healthier.

4.
We (reduce)
climate change if we (release)
less carbon dioxide into the atmosphere.