America is an ________ country.
The world’s elderly population will exceed(超过) ____ of children by 2060, when each group ____ to account for about one fifth of the population.
--- We will take the conditions into careful consideration ________ you have attached to this contract.--- Thanks. Hope for further cooperation
My parents disapproved of my decision to give up a promising business career and study music, which was understandable ________ my family background.
There’s nobody here our English teacher. Fortunately, she is more than glad to give us help when we are in trouble.
--- “What’s made you so upset?”---“________ three tickets to the pop music concert.”