Supply the correct tense or form of the verbs in parentheses

1. Thirty years ago, we (not/ have)…………………….…….. mobile phones.

2. I (already/ read)…………………..……… that book about volcanoes. It’s amazing to know how they are formed.

3. Susan did not interrupt Jim because he (talk)………………..…….. to the teacher.

4. Are you interested in (ride)…………………………..…. a horse?

5. You have (finish)………………..……. your work before having a day off.