解析　词义猜测题。根据第三段对Daniel和Liz的叙述，他们厌倦了住在市中心而搬到了郊区去住，由此可以看出，所谓的downshift是指从城市中心搬到乡下或郊区去住。

　　B

　　(建议用时8′)

　　President Xi Jinping delivers a policy speech to Chinese and United States’ CEOs during a dinner reception in Seattle，Washington，September 22,2015.

　　Beijing and Washington must read each other’s strategic intentions correctly，and have “less estrangement (隔阂，疏远) and suspicion in order to forestall (预先阻止) misunderstanding and miscalculation，” said Chinese President Xi Jinping Tuesday night in his first major policy speech on China­US ties since he arrived in the US early Tuesday.

　　Xi called for more understanding and trust between the US and China，prior to his formal talks with President Barack Obama at the White House on Friday.

　　“China is ready to set up a high­level joint­dialogue mechanism with the United States on fighting cybercrimes，” he said，adding that the Chinese government was a firm defender of cybersecurity while also being a victim of cybercrime.The world’s two largest economies “should strictly base our judgment on fact，for fear that we become victims to hearsay，paranoia，or self­imposed bias”．

　　Xi made his remarks in a 40­minute speech，the only public speech during his US visit，at a dinner attended by more than 750 business leaders and other dignitaries (显要人物)，including former secretary of State Henry Kissinger.It was sponsored by the National Committee on United States­China Relations and the US­China Business Council.

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