单选题 Much ______ her relief and joy, she heared that her son had come back safe and sound.
A. to B. for C. with D. as

【正确答案】 A
【答案解析】[解析] 句子的大意为：令她放松和高兴的是，她听说儿子安然无恙地回来了。to her relief and joy与短语to one's surprise类似，所以A项符合题意。