Ex. 25
1. Rabits don't catch wolves. Wolves catch rabbits.
2. The Earth doesn't go round the Moon. The Earth goes round the Sun.
3. The Volga river doesn't flow into the Black Sea. The Volga river flows into the Caspian Sea.
4. Patients don't look after nurses in hospitals. Nurses look after patients patients in hospitals.
5. Water doesn't boil at 50 degrees Centigrade. Water boils at 100 degrees centigrade.
6. Indians don't live in Scotland. They live in North, South and Central America.
7. Tailors don't make things from dough. Tailors make things from fabric.
8. Our city doesn't stand on the river Thames.Our city stands on the Moscow river.
9. It doesn't often rain in Africa. It rarely rains in Africa.
10. Tigers don't eat grass. Tigers eat meat.
11. Our group doesn't study Arabic. Our group studies English.
12. Our classes don't begin at 5 a.m. Our classes begin at 8 a.m.