d like a job which pays more, but_________ I enjoy the work I’m doing at the moment

在下列句子的空缺处依次填入词语，最恰当的一组是（ ）①掐丝是一种非常 的工作。②这篇论文写得精准透彻，主要得力于作者 了大量资料。③人类对大自然的每一分破坏，都遭到了相应的报复，环境污染的威胁不亚于第三次世界大战，这绝不可 。

.Few people paid full attention to their health conditions _____ they were seriously ill

Our government is trying its best to ____the social security system to protect people’s rights．

____, I have never seen a person as warm-hearted and patient as Jack.