they的形容词性物主代词造句

　　Their smaller rival is battling to end their duopoly.

　　比他们小的竞争对手正在为结束他们两家寡头集团而斗争。

　　Their price depended almost entirely on their scarcity.

　　他们的价格几乎完全靠他们的`供不应求。

　　Their friends suggested they should put up their prices.

　　他们的朋友们建议他们提高价格。