下列句子中加点的词语，使用恰当的一项是（ ）

The old man was _______ sad _______ say a word when he heard the bad news.

Don’t play here. It’s a street. –OK, I _________.

Ann is still unhappy today. — It’s all your fault. You ____ to her yesterday for your mindless mistake. [ ]

Grace kept on __________ , although she was ill.