Facts prove that the world’s economic development is not a win-lose game but one in which all ________ be winners.
Listening to music can be very enjoyable, but ________ can be appreciated unless you like it.
The cultural background of China is totally different from ________ of the US.
The teacher praised me for ________ progress I'd made, which was ________ great encouragement to me.
As ________ birthplace of Huaxia civilization, Xi'an is ________ city with a long history and abundant cultural relics.
University is ________ most worthwhile time of discovery and learning, and it is also ________ very enjoyable and valuable experience for every one of us.