2017年6月四六级真题答案※ 微信对答案 ※ 四六级万题库估分

　　46 B a shift to city centers

　　47 C People can enjoy services around the clock

　　48 C Their parents' bad experience still haunts them

　　49 D The worsening infrastructure

　　50 B Hopeful

　　51 D New information learned pushes old information out

　　52 C It facilitates our access to relevant information

　　53 B What contributes to forgetting

　　54 A It adds to the burden of their memory

　　55 C It is a way of organising our memories.

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