Complete by changing the form of the verb in brackets into the ...

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Complete by changing the form of the verb in brackets into the Past Perfect. 1.Tania ... (not/finish) doing housework by five o`clock,so she called Nadia to tell her she would be late. 2.She didn`t eat anything at the party because ... (she/already/eat) at home. 3.He ... (just/finish) his homework when the teacher came in. 4.By the time I arrived,the play ... (start)! Помогите плиз