When he_____there.a.returned to b.retured back c.returned

When he_____there.a.returned to b.retured back c.returned He_____there now,but I am not sure.A.maybe B.may be C.may have been D.might have been 怎么区别.a是副词.b是情态动词.c也许已经怎样.d跟c区别不大.根据语意选b.这是对的吗? When he was a Maybe when a turnaround heart skpis a beat when i ,when when i need a friend When did you [ ] a meeting? When loneliness has become a it when a neighbour passed it when a neighbour passed When is a door not a door? When is a door not a door? when is a person not a person? when I can't decide ___ play football.A.to when B.when C.when to D./ Cou you tell me____beijing A.when leave B.to leave when C.when to leave D.when leaves When a man love the woman 歌词 a picnic shall we when have