1.I wonder if it is convenient for you to help me to find a candidate.
2.Library is a place which should be quiet,so as to offer us a study atmosphere.
3.I really thank for your lending CD to me,with which I could kill time when i feel bored.
4.The first time I heard of the restrictions on plastic bag,I felt relieved.
relieved表示adj.放心的 v.减轻；解除（relieve的过去分词）
你想表达的是这个意思吗?