1. Yes, speaking.
    是我，请讲。

2. Stop speaking filthy remarks!
    不要再说肮脏的话了!

3. On the other hand, speaking for two or three minutes at a time would hold their attention and make my job infinitely easier.
    而每次讲两三分钟就能吸引他们的注意力，而且会对我的工作极有帮助，使之变得更容易。

4. I was speaking about the picture, about its artistic value.
    我是在说这幅画和它的艺术价值。

5. It is common to look up, down, and all around when speaking to others, and not have eye contact at all times.
    而你自己对别人说话时，向上、向下、以及向四周看看，这都很平常，你不必一直保持与对方目光的接触。