B．to prevent the bell in the tower

　　C．to protect the foundation

　　D．to keep the soil at the tower

　　解析　推理判断题。见第二段最后两句。

　　答案　C

　　50．According to the way it is written，this passage is more like ________.

　　A．a funny history story

　　　B．a serious tour advertisement

　　C．an exciting announcement

　　　D．a common science report

　　解析　推理判断题。根据全文可知D为最佳答案。

　　答案　D

　　E

　　A different sort of generation gap is developing in the workplace.Someone－specifically the father­daughter team of Larry and Meagan Johnson－has figured out that on some American job sites，five generations are working side by side.

　　In their new book about generations in the workplace the pair argue that while such an age difference adds a lot of texture and a variety of life experiences，it can also bring tensions and conflicts.

　　The Johnsons are human­resource trainers and public speakers.Dad Larry is a former health­care executive；daughter Meagan is a onetime high­level sales manager.

　　Here are the oldest and youngest of the five generations they identify：

　　They call the oldest group Traditionals，born before 1945.They were heavily influenced by the lessons of the Great Depression and World War Ⅱ.They respect authority, set a high standard of workmanship，and communicate easily and confidently.But they're also stubbornly independent.They want their opinions heard.

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