be up to do 还是 be up doing 哪个对

be up to do 还是 be up doing 哪个对 be up to do something 是be up to sb to do还是doing? be up to speed be booked up to be up to 94% grow up还是be grown up“长大”的意思I want to ______(A) grow up(B) be grown up to be grow up is to be What do you want to be when you grow up what do you want to be when yougrow up?why 用be up to造句 be up to one's be up to sb’s be up to是什么意思啊? to be up for和be up for的区别 What do you want to be when you grow up?这里为什么要用to be? be up to do be up to doing be up to sb to do sth it is up to you 他们之间有何区别?哪be up to doing be up to do 有忙于做某事的意思么 It must be terrible to be grown up!grown up与grow up有什么区别