47是哪个国家的区号:Effectiveness can be learned , and it also has to be learned! STAY LOCAL, GO GLOBAL。

Effectiveness can be learned , and it also has to be learned! STAY LOCAL, GO GLOBAL。 can be,may be和must be can be与must be 的区别 Flying kites can be fun! All that can be done_____. All that can be done__________. be able to和can what table can be eaten can't be helped Can u be my girlfriend?????