76.∧ listen→who或listen→listening 77.probable→likely 78.was / 79.√80.of→on
81.increases→increased 82.so→as 83.before→when 84.either ∧→to 85.∧ volume→the
略
76.∧ listen→who或listen→listening 77.probable→likely 78.was / 79.√80.of→on
81.increases→increased 82.so→as 83.before→when 84.either ∧→to 85.∧ volume→the
略