27. I really wanted to take part in this contest, _____ my parents allowed me to. A. because B. or C. so D. but 28. - Laura: “You look great in the new dress!” - Maria: “_______” A. That's fine. Thank you. B. You are welcome. C. Yours is lovely, too D. Of course not, you bet! 29. “I’ve decided to repaint this room.” -“What colour_________it? A. you will paint B. you are going to paint C. are you going to paint D. will you paint 30. He agreed_____the contract with this entertainment group. A. signing B. sign C. signed D. to sign 31. Let me______you how to play this flute. A. explaining B. explain C. to explain D. to explaining 32. She refused___________out with me. A. to go B. go C. going D. went 33. They are fond of___________movies. A. watch B. to watch C. watching D. watched 34. Scientists have researched into effective ways to treat this disease ......................................last year’s epidemic A. for B. since C. when D. as 35. Linda has lost her passport again. It’s a second time this ........................................................... A. has happened B.happens C. happened D. has been happening 36. She ________ a talk with her sister last night. A. had B. is having C. has had D. has 37. Volunteers have a chance ________ with new cultures and speak new languages. A. interacting B. interact C. to interact D. interacted 38. Qualifications are important but ________ experience is always a plus. A. bad B. useless C. valueless D. practical 39. The charity is dedicated ________ serving young people with special needs. A. for B. to C. on D. about 40. There is nothing to be ________ from delaying the decision. A. gained B. made C. took D. did giải thích nữa ạ ( ctlhn )