they的形容词性物主代词是

　　Their friends suggested they should put up their prices.

　　他们的朋友们建议他们提高价格。

　　Their success is ascribable to the quality of their goods.

　　他们的`成功在于商品的质量。

　　Their success is due in large part to their determination.

　　他们的成功在很大程度上应归功于他们的决心。