Robbywasalreadyelevenyearsoldwhenwefirstmet．I41toteachy...
問題詳情：Robbywasalreadyelevenyearsoldwhenwefirstmet．I41toteachyoungerkidspianolessons，butRobbysaidhearinghimplaythepianohadalwaysbeenhismother’s42．SoItookhimasmystudent．Formmonths，hardasRobbytried，he43thes...