Read these sentences and choose the correct answer to fill in the gaps.
1. Elephants climb trees.
can
can't
couldn't
could
2. Now that I am an adult, I sleep all day. I have to work.
could
couldn't
can't
can
3. If you lived in the country, you grow your own vegetables.
couldn't
can
could
can't
1. can't 2. can't 3. can