Помогите !
Put the verbs into correct form:
1) Mother ( to clean) __ the flat before her cousin returned.
2) when we ( to arrive) __ the train ( not to leave ) __ yet.
3) when my brother ( to come ) __ home i ( to read ) ___ a book.
4) he ( to put on ) __ his coat and cap, ( to open)__ the door and ( to go ) _ out.
5) at this time yesterday we ( to have ) __ dinner.
6) tom ( to return ) ___ from the cinema by oclock

1)Mother ( had cleaned) the flat before her cousin returned.
2) When we ( arrived) the train ( had not left ) yet.
3) When my brother ( came )  home I ( was reading ) a book.
4) He ( put on ) his coat and cap, ( opened) the door and ( went ) out. 
5) At this time yesterday we ( were having ) dinner. 
6) Tom  ( had returned ИЛИ will have returned) from the cinemaby 7 oclock.

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