III. Give the correct form of verbs in brackets.
1. I ( not read) ____________ this book yet. Can I borrow it for a week or so?
2. There are about 750 million people speaking English in the world, and this number ( increase) _________fast.
3. If I (be) you_______________, I wouldn’t dump waste into the lake.
4. A few people ( not leave )_______ before the volcano erupted.