Original sentence: The pilot flew the aircraft safely. A. The aircraft flew safely. B. The pilot was flown by the aircraft. C. The aircraft was flown safely by the pilot. D. The aircraft is flyed safely by the pilot.

Original sentence: The mechanic checks the engine every morning. A. The engine checks by the mechanic every morning. B. The engine is checked by the mechanic every morning. C. The mechanic is checked the engine. D. The mechanic was ch

Original sentence: Engineers inspect the runway before take-off. A. The runway inspects before take-off. B. The engineers are inspected before take-off. C. The runway is inspected by engineers before take-off. D. Runway was inspecte

Original sentence: The captain gave clear instructions to the crew. A. The captain shouted at the crew. B. The captain offered complicated instructions. C. The crew was given clear directions by the captain. D. The captain gave conf

Original sentence: Technicians fixed the navigation system. A. The navigation system is fixing now. B. The navigation system was repaired by technicians. C. The technicians repaired the system navigated. D. Technicians are fixing th

Original sentence: They repaired the landing gear yesterday. A. The landing gear is repaired yesterday. B. The landing gear was repaired yesterday. C. They was repaired the landing gear. D. The landing gear repaired by them yesterday.