解析：选A。细节理解题。根据第一段中的“A new study suggests that listening to music in the office improves the speed and accuracy of tasks such as data entry”可排除B项；根据第二段中的“then classical music is the most effective as it improves maths skills”可排除C项；根据第三段中的“Dance music also had a positive effect on spell­checking”可排除D项。A项文中未提及。故A项正确。

　　3．The result of the experiment showed that when music was played，________.

　　A．88% of people worked faster

　　B．81% of people did their most accurate work

　　C．90% of people worked better

　　D．75% of people completed data entry task faster

　　解析：选C。细节理解题。根据最后一段中的“Overall，it showed that when listening to music，nine out of ten people performed better”可知，百分之九十的人在听着音乐时的表现更好。故C项正确。

　　4．What can we conclude from the passage?

　　A．Music may be helpless to people in office.

　　B．Silent offices can make people work better.

　　C．Different kinds of music have the same effect.

　　D．Silent offices may make people work least profitably.

　　解析：选D。推理判断题。根据最后一段第一句“The research...suggests that silent offices may be the least productive.”可知，研究表明在安静的办公室工作，人们的效率最低。故D项正确。

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