她不确定是否要去新西兰。

She's ___uncertain whether to go to New Zealand or not.

布里迪不确定是否要见他。

Bridie was ___uncertain about meeting him.

有一些我不确定的事情，如果你能解释我会很感激。

There are things that I am ___uncertain about, and I would be grateful if you could explain.