48. Jane’s eyes burned and her shoulder ached. She ______ at the computer for five straight hours. A. is sitting B. has been sitting C. was sitting D. had been sitting 49. The man who sat beside me on the plane _____ nervous. He _____ by air before. A. looked/ has never traveled B. looked/ had never traveled C. was looking/ never traveled D. looked / was never traveling 50. The Second World War _______ in 1939 and _______ in 1945. A. begins/ ends B. had begun / ended C. began/ had ended D. began /ended 51. It seems that whenever I travel abroad, I _______ to take something I need. A. forgot B. am forgetting C. forget D. had forgotten 52. I _______ Casablanca for the first-time last night. I _______ it before. A. saw /had never seen B. see /have never seen C. have seen /never saw D. was seeing /had never seen