Mr Smith ___(go) home.He left half an hour ago

用英语解释句子Mr Green left the office half an hour ago This exerci They left here half an hour ago.(同意句转换) 改写He returned home an hour ago He returned home an hour ago 正确形式填空1.the bus ____(go),it left half an hour ago.2.tody you He was here().A.half an hour before B.half hour ago C.half a When did the train ___ Half an hour ago it usually______her half an hour to go home by bus. millie left the school half an hour ago millie____ ____ ____ -___ you ____ the next yet?-Yes,I ___ it half an hour ago. Mr.Johnson arrived here about half an hour ago.(对划线部分提问）划线部分 half an hour ago 什么意思?