Помогите пожалуйста!!!! Выбирете правильный вариант. 1.By the time I came all the work(a.was done,b.has b

Помогите пожалуйста!!!! Выбирете правильный вариант. 1.By the time I came all the work(a.was done,b.has been done,c.had been done) 2.I have (a. a,b.the,c.--) 3.Has the letter been dictated(a.--,b.to,c.for)the secretary? 4.(a.Do I must to,b.Do I must.c.Must I to,d.Must I)go there at once? 5.Everybody ha left (a.hasn't everybody,b.hasn't he,c.haven't they) 6.We waited for them for a long time but they(a.never came,b.have never come,c.had never come) 7.I want (a.you to wash,b.you wash,c.you washing)the dishes right now.