约翰确实是做这个决定最合适的人选。

John is really the best ___qualified to make that decision.

我对这个主题真的不够了解，无法给出建议。

I'm not really ___qualified to give advice on the subject.

我认为在我国没有其他人有资格接替他的职位。

I don't think that anyone else in my country is ___qualified to take over his seat.