By the time he realizes he _____ into a trap, it’ll be too late for him to do anything about it. [ ]

t you think learning English wastes much time— ____ You haven’t got a proper method, I suppose

______ the help of an American teacher, we can learn real English

Customers are asked to make sure that they the right change before leaving the shop.

not be a great suggestion. But before ______ is put forward, we’ll make do with it.