Choose the correct item. 1< > -< > a) had lost, b) lost, c) have been lost, d) have lost. 2< > , - < > a) have helped, b) am going to help, c) helped, d) will help.3 at 10 o'clock last night? a)have you done, b) were you doing, c) have you been doing, d)had you done.4 < > -< > a) will work, b) am going to work, c) will have been working, d) will be working. 5< > -< > a) seen, b) have see c) will have seen, d) will be seen.