mom has been (worried about) 还是worrying about my health all the time

mom has been (worried about) 还是worrying about my health all the time has been to the zoo for five times 和My mom has been to Beijing twice.为什么一个要用for一个又不用? has been All my today’s homework （）now.Can I go out and play football,Mom 是has been finished还是have been finished,说明为什么选have或has. --------------Mom,where is my lunch pack?--------------Just where it ( )A.has been B.had beenC.was D.be正解为C,我选A了,为什么呀 has always has always been has been anything taken. Where has she been? has been replaced How has China been? Has been very quiet Everything has been achanged Has been forward life has been good china has been free - Mail has been sent Video has been removed Love has been terminated