While two detectives were keeping guard at the door.分析一下此句中k

While two detectives were keeping guard at the door.分析一下此句中k you two keep guard at the door 和you two to keep gard at the Policemen were keeping guard outside the building.翻译 what were you doing when someone knocked at the door?分析一下句型 door .responsibility is to at the your keep guard it 连词成句 While two men () at the door,two others went into the house The students were walking through the door,two at ________ t Somebody knocked at the door while I___ G.both,all 1.There were two girls at the door.____of them we The plane was late and detectives were waiting at the airpor 【送分题】the plane was late and detectives were waiting at the a the plate was late and detectives were waiting at the airpoe