34. Do you know that environmentalist___________? A. with whom I used to work B. with that I used to work C. with used to work D. with who I used to work 35. The knife _________ we are cutting bread is very sharp. A. with that B. with which C. which D. that 36. The energy ______________ by the windmill drives all the drainage pumps. A. that is producing B. which produces C. producing D. produced 37. They buried thousands of fish __________ by poisonous chemicals from a nearby factory. A. to kill B. killing C. killed D. which kill 38. The old man __________a black suit is a famous energy researcher. A. to wear B. wearing C. whom is wearing D. is wearing 39. The man __________ next to you is my uncle. A. who sit B. that sitting C. sat D. sitting 40. The last student __________ John. A. to be interviewed was B. to interviewed was 4 C. was to be interviewed D. to be interviewed 41. Coal was the first fuel __________ to power machinery. A. is used B. using C. to use D. to be used 42. I saw many houses _________ by the storm. A. that were destroyed B. destroying C. were destroyed D. to destroy 43. The last person that leaves the room must turn off the lights. A. The person who turns off the lights must leave the room. B. The last person to leave the room must turn off the lights. C. The last person to turn off the lights must leave the room. D. The one who turns off the lights in the room is the last person.