Exercise 1: Choose the best option: 1. Too much fresh water ( is wasted/ wastes/ are wasted/ was wasted) everyday. 2. The lions ( is fed/ are fed/ was fed/ fed) twice a day by the guard. 3. This computer ( wasn’t used/ isn’t used/ hasn’t been used) for a long time. 4. A lot of animals in this forest ( was killed/ were killed/ have been killed) in 1998. 5. English ( is spoken/ are spoken/ was spoken) in many countries. 6. My bike ( hasn’t been/ wasn’t/ isn’t) repaired yet. 7. The police ( caught/ has caught/ has been caught) two criminals yesterday. 8. ( Do/ Does/ Is/ Are) rice grown in tropical countries? 9. By whom (do/ does/ was/ is) this machine invented? 10. The doctor (took/ has taken/ has been taken) care of my grandfather for two weeks.