恐怕这本书目前缺货。

I'm afraid the book is ___out ___of ___stock at the moment.

有时你想要的那件商品会缺货。

Sometimes the item you want is ___out ___of ___stock.

抱歉，这款型号目前没货了。

I'm sorry, but this model is currently ___out ___of ___stock.