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Question

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When he (come)home he (begin) (tell)tales about trip. 
He (speak) about the things he (done). 
One day he (tell) his friends he (take) part....
I (win)it. 
Just (go) ...
Everyone (tell)... 
Who (listen)... 
Lets (imagine)....

Татьяна* Sh* · Accepted Answer

When he came home, he began telling us tales about trip. 
He speaks about the things he has done 
One day he told his friends he had taken part... 
I won it 
 
Дальше вообще непонятно, предложения незаконченные.