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78. B (Singing teacher Ruth Black believes it would make everyone so friendly that they would never walk past each other again without saying hello....)
79. A (Everyone is able to sing, she says, but most of us think we can't or have forgotten what we learned as children)
80. C (Ruth believes that singing itself brings other benefits/ It encourages good breathing, for example. Through singing, people often become more confident and also learn to control stress. But more than anything, it brings people together)
81. D (When Ruth first started singing, there was a little...running her own classes)
82. C advertisement ~ quảng cáo