19. Look! Somebody ……in the river. A. is swiming B. are swimming C. am swimming D. is swimming 20. The phone ……. A. aren’t ringing B. isn’t ringing C. don’t ringing D. doesn’t ring 21. I …….tred. I need a rest. A. is getting B. are getting C. is geting D. am getting 22. Tim …….this week. He is on holiday. A. is not working B. are working C. am working D. works 23. Listen! Sam ……..the piano. A. are playing B. am playing C. plays D. is playing 24. They …….a new hotel in the city center. A. are building B. am building C. is building D. build 25. Look! Somebody …….in the river. A. is swiming B. are swimming C. am swimming D. is swimming 26. The phone ……. A. aren’t ringing B. isn’t ringing C. don’t ringing D. doesn’t ring Exercise 2:Find and correct the mistakes. 1. He paints his pictures at the moment. 2. We plant the herbs in the garden at present. 3. They makes the artificial flowers of silk now. 4. Your father are repairing your motorbike at the moment. 5. Look! The man takes the children to the cinema. 6. Listen! The teacher are explaining a new lesson to us. 7. Be careful! You brings ten glass bottles. 8. Ba studies Math very hard now. 9. We is have dinner in a restaurant right now 10. I watching TV with my parents in the living room now.