I/ Cho dạng đúng của động từ trong ngoặc. E.g: They agreed (meet) __to meet__ on Friday. 1. It’s important for children (learn) _______ how to get on with each other. 2. I don’t know how he can (afford) _______ a new house on his salary. 3. (collect) _______ antique vases is my hobby. 4. I’m so hungry. I’d like something (eat) _______ right now. 5. I congratulated Nancy on (win) _______ the race. 6. She has a secret admirer who keeps (send) _______ her gifts. 7. It’s half-past four. I’d better (go) _______ now before the traffic gets too bad. 8. I am calling to thank you for helping us (find) _______ the right hotel for our holiday. 9. I really have to force myself (be) _______ nice to him. 10. Be careful (look) _______ both ways when you cross the road! 11. I appreciate your (make) _______ the effort to prepare everything yourself. 12. I must confess to (know) _______ nothing about her. 13. He is trying to persuade domestic and international businesses (invest) _______ in his project. 14. The boy was eager (get) _______ home and play with his new toy. 15. The council is considering (ban) _______ trucks at rush hours to reduce traffic congestion. 16. I would rather (walk) _______ to work. 17. We are responsible for (keep) _______ the office clean. 18. I couldn’t help (laugh) _______ when he told the joke. 19. On cold mornings my car usually refuses (start) _______. 20. Has your father given up (smoke) _______ yet? 21. Nothing can make me (change) _______ my mind. 22. (Take) _______ photographs is one of my favourite hobbies. 23. The landlord threatened (evict) _______ me if I didn’t pay the rent on time. 24. It is unnecessary for you (water) _______ the plants more than once a day. 25. The campaign has certainly succeeded in (raise) _______ public awareness of global warming. 26. It’s no use (pretend) _______ to like her paintings. 27. Don’t let your children (watch) _______ television more than one hour per day. 28. Why not (stay) _______ to have dinner with us? 29. I can’t stand (sit) _______ silently without doing anything. 30. After the tsunami we felt grateful (be) _______ alive.