work.

　　A new study suggests that listening to music in the office improves the speed and accuracy of tasks such as data entry, proof reading and problem solving.

　　In an office­based experiment, 88 per cent of participants were found to produce their most accurate work when listening to music.

　　The study also found that 81 per cent completed their fastest work when music was played.

　　And it matters what type of music you listen to.For instance, if you're doing your tax returns, then classical music is the most effective as it improves maths skills.

　　Listening to Jessie J or Justin Bieber could also improve your speed, with 58 per cent of participants completing data entry tasks faster while listening to pop songs.

　　During proof reading, dance music, such as David Guetta, had the biggest positive impact with participants increasing their speed by 20 per cent compared to tests undertaken with no music at all.

　　Dance music also had a positive effect on spellchecking with a 75 per cent pass rate compared to 68 percent when no music was played at all.

　　The research，undertaken by Brighton­based Mindlab International，suggests that silent offices may be the least productive.

　　"The music experiment showed that when listening to music，nine out of 10 people performed better，" said Dr. David Lewis，Chairman of Mindlab International.

　　"Proper music enables people to quickly process and keep information, regulate their behaviors, make good choices, solve problems, plan and adjust to changing mental demands，" a senior investigator of Mindlab International explains.

　　"While many schools are cutting music programs and spending more and more time on test preparation，our findings suggest that musical training may actually help to set up children for a better academic future，" added Dr. David Lewis.

　　5．What does the passage mainly talk about?

　　A．The positive relationship between music and efficiency.

　　B．The speed and accuracy of problem­solving tasks.

　　C．The comparison of different kinds of music.

　　D．The experiment on productivity of office staff.

　　6．According to the passage, we can conclude that ________.

　　A．different kinds of music lead to the same effect

　　B．silent offices can make people perform better

　　C．listening to proper music can improve efficiency in the office

　　D．more tests prepare children for a better academic future

7．What is the author's attitude towards school music programs?