点击查看答案 Task 4 （13 marks)
41.12-17
42.browser
43.seniors
44.drastically (plus other appropriate adverbs)
45.die/disappear
46.one place/news feed
47.cloud (email) based//cloud(-based) (email) service/system
48.cut costs
49.connecting with/contacting (prospective) customers
50.office productivity
51.office efficiency
52.Sceptical
53.Enthusiastic
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