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Yesterday , to make classroom clean, how long , did , them, it, take, after, classes?
Will ,take , dennis ,this exercise, to write, it, five minutes, on the black board,
Take, james, to correct, in his composition, how long , did, mistakes , it

1) how long did it take yesterday to make clean after classes? 2) will it take Dennis 5 minutes to write ex. on the black-board3) how long did James it take mistakes to correct in his composition ?