৪৭৮৮১
The man is going to drown ____ nobody jumps into the river to save him.
উত্তর
unless
৪৭৮৮২
Martin hasn’t got a library ticket, ____ he can’t borrow books from the library.
উত্তর
so
৪৭৮৮৩
____you have driven a car like this, you will never want to drive any other car.
উত্তর
Once