When you sing,you begin with Do,Re,Mi.When you study,you beg

When you sing,you begin with Do,Re,Mi.When you study,you beg When you sing ,you begin with Do ,Re,Mi.When you stady ,you 请问when do you begin to study English.和 when did you begin to Do you know when conputers begin?是什么意思 How do you know when computers begin? Do you know when computers begin? when do you begin ___（sing） for the foreign guests? when you re gone when you're gone When you hear birds singing, do you want to sing with them? Do you find that when you are busy with your study on the In What should you do when you're tired?（急!）