Hopefully this will help. I have finished the sentences in bold and the given word has been underlined. 26. The power sensor reports low battery current to the processor, which <u>prevents</u> the robot from moving. 27. The computer is being <u>used</u> at the moment. 28. The machine has <u>been</u> switched off. 29. You <u>must </u>not park your car on this pavement. 30. He did not need to <u>have</u> air conditioning. 31. It's the <u>most</u> interesting<u /> form of transport I've ever seen/ 32. New York is <u>much</u> further away <u />than London. 33. The supervisor said that they will change the filters in the <u>following</u> week. 34. The supervisor asked <u>whether</u> they had repaired the machine the day before. 35. The engineer <u>agreed</u> to paint the tank. 36. The engineer <u>told</u> James he must work harder. 37. Jim asked <u>to</u> close off the valve. 38. The customer asked the shop assistant <u>how</u> much water it will save. 39. You don't <u>have</u> to use wood. Plastic is necessary. 40. You are <u>not</u> permitted to build within one meter of another building. 41. He asked <u>if</u> I could help him with those tools. 42. He <u>suggested</u> opening a new factory in Leeds. 43. I <u>have</u> never been on an oil rig before. 44. I have worked here <u>since</u> 1990. 45. The prototype hasn't <u>been</u> tested yet. 46. He has been working on the project <u>since</u> joining R&D 47. Reinforced concrete has been <u>used</u> on the decks of suspension bridges. 48. Various additives have been added to improve the mechanical, physical, or chemical properties of plastic.