Сделать вопросы 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
2) will it take Dennis 5 minutes to write ex. on the black-board
3) how long did James it take mistakes to correct in his composition ?