Who can it be at this time of

Who can it be at this time of who can it be at the door?准确翻译 who can it be?:can用法 who can it be i am quite at a loss to guess. who can it be,求讲解 6.There is someone knocking at the door,who _____ it be?A.can B.may C.must D.need Someone is knocking at the door,but who can （ ）be.A one B heC It D this说出原因 —There is a knock at the door.—---------------?A.who is that?B.who can it be?...—There is a knock at the door.—---------------?A.who is that?B.who can it be?C.who is he?D.do you think who he is?a和c为什么不对啊 If that is not yours,( )?A、who can it be B、whose can it beC、who it can be D、it can be whose -Who ＿＿it be that is knocking at the door -It＿＿b-Who ＿＿it be that is knocking at the door -It＿＿be Father ,but I'm not sure .A.can ;must B.can ;may C.must ;can D.may ;must 这题选什么?为什么?老师又公布答案了：选A！但 Someone is knocking at the door.Who can it be?的回答.A.Nothing B.I will go and answer itC.Cheer up D.You make it. Remain concerned about your person who can it be? There's someone outside.Who ___it be?There's someone outside.Who ___it be?It must be Mary.She promised to come here over at 8:00.A:must B:can C:shall D:need为什么? Who ------it be?It must be Mr.Wang A may B must C might D can who can do it? who can it 急要 ---Someone got full marks in the last math exam.---Guess _____?A:who can it be B:who it can be C:who could it be D:who it could be .请问大家应该选什么? 英语翻译who is most at risk from the hazardous effects of thi chemical?