sad
知道了這個(gè)壞消息后他們十分傷心.
at: 多用來表示感情上的原因,常和表示一定感情的詞連用.例如：
I’m much pleased at your arrival.
你來了我非常高興
He is angry at being delayed.
他因被耽擱而生氣.
People wondered at his skill,
人們驚嘆他的技藝.
常見的短語還有：be afraid at, be surprised at, be happy at, be frightened at, be sad at, be in deep sorrow at, at sight of etc.
根據(jù)文章強(qiáng)調(diào)是壞消息,用sad較好.