(一):This matter has been covered just now.

这个问題刚刚已经讨论过了。

This matter has been covered just now.
这个问题刚刚已经讨论过了。
But we haven't reached an agreement on it.
但是我们还没有达成一致呢。

We've already debated/discussed this matter.

(二):Shall I repeat the question?

用我重复一遍问题吗？

Shall I repeat the question?

用我重复一遍问题吗？

Yes, please.
好的，请说吧。
I'm sorry. Could you please repeat that explanation?
对不起，可以重复一下你的解释吗？
Can you please say that again?
你能重复一下吗？