Passage one (霍金对AI的警告)
46. B - It might be a blessing or a disaster in the making. ;
47.C一It was extremely important to the destiny of humankind.
48.A - The shift of research focus from the past to the future.
49. D - Super - intelligence may eventually ruin mankind.
50. C - They share the same concerns about AI as academics.
Passage Two (卖货给老年人)
51.B - They want to have a share of the seniors’ goods market.
52.C - Collect residents' feedback on their products.
53.D - It is communication system via TV instead of a computer.
54.A一Winning trust from prospective customers.
55.B一They are quite at ease with high-tech products.
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