他喜欢穿黑色的夹克。

He prefers to wear a ___black jacket.

黑人历史月是为了庆祝黑人群体的成就。

___Black History Month celebrates the achievements of ___Black people.

洞穴深处一片漆黑，什么都看不见。

Inside the cave, it was completely ___black and we couldn't see anything.

那年是个黑暗的时期，许多人失去了工作和家园。

That year was a ___dark time when many people lost their jobs and homes.

警方正在调查这个地区的黑市交易。

The police are investigating the ___black market activities in this area.