项目的第一阶段可能在八月前完成。

The first ___phase of the project is likely to be completed by August.

我们正在进入国际关系的新阶段。

We're entering a new ___phase in international relations.

当我十几岁出头时，我经历了一个只穿黑色衣服的阶段。

When I was in my early teens I went through a ___phase of only wearing black.