It was such a to hear that her son was found safe and sound in the forest.A. easeB. assist

问题补充：

It was such a to hear that her son was found safe and sound in the forest.

A. ease

B. assistance

C. comfort

D. relief

答案：

A. ease

B. assistance

C. comfort

(答案→)D. relief

解析：考查名词辨析。A轻松，舒适；B帮助；C安慰；D安慰，减轻；本句中的relief具体化为一件令人轻松的事情。句意：听见她的儿子在森林里安然无恙地被发现了，这真是一件令人轻松的事情啊！故D正确。