1. Keep silent, please. Our teacher (explain) _____is explaning_________ the lesson. 2. We (be) ________have been_________ students for four years. 3. I will send him the message as soon as he (return) ______returns___________ 4. Thanks for (invite) ______inviting________ me to the birthday party. 5. Peter couldn’t read until he (be) ______was_______ eight years old. 6. What ____________ your father usually ____________ (do) in the evenings? 7. I can (see) _________________ the children. They (play) ______________ in the yard. 8. Would you like (listen) _________________ to music? 9. No, thanks. I like (read) _________________ books. 10. Don’t worry. I (give) ____________ him your message when I (see) __________ him. 11. You (think) _________ collecting stamps costs much money? 12. My father thinks mountain climbing (be) _________ more dangerous than skating. 13. Every year, my mother (give) _________ me a nice doll on my birthday. 14. My brother (not like) _________ collecting stamps, he likes collecting glass bottles. 15. My sister likes (cook) _________ very much. She can cook many good foods. Exercise 2: Put the verbs in the brackets into correct tense or form: 16. Does your brother like (listen) _________ to music in his free time? 17. I think in the future, more people (enjoy) _________ going out by bicycles. 18. My father says when he's retired, he (go) _________ back to his village to do the gardening. 19. We are planting trees around our school now. Our school (be) _________ surrounded by a lot of green trees.