complete the sentences. 
1 (how do aeroplanes fly?)  do tou know aeroplanes fly?
2 (where does susan work?)  I don't know...
3 (what did Peter say?) Do you remember...
4 (why did he go home early?) I don't know...
5 (What time does the film begin?) Do you know...
6 (How did the accident happen?) i don't remember..

1 Do you know how aeroplanes fly?2 I don't know. where Susan works.3 Do you remember what Peter said?4 I don't know why he went home early.5 Do you know what time the film begins?6 I don't remember how the accident happened.