发现了一包白色粉末，警方科学家正在分析它。

A packet of white ___powder was found and police scientists are analysing it.

为什么电视上有这么多洗衣粉的广告？

Why are there so many adverts for washing ___powders on TV?

我把废弃的咖啡粉放进了一个盒子里。

I put the wasted coffee ___powder into a box.