题目内容
20．When he knew that his son returned safely after being missing for over a week，he burst into tears ______．（ ）| A． | in relief | B． | in peace | C． | in brief | D． | in charge |
分析 句意：当他得知他儿子在失踪一个多星期以后平安回来时，他如释重负地哭了
解答 答案：A．根据 he knew that his son returned safely after being missing for over a week可知他得知他儿子在失踪一个多星期以后平安回来，所以后句表示他如释重负地哭了．四个选项的含义分别是in relief如释重负； in peace和平地； in brief 简短地，简言之；in charge 负责．因此答案是A．
点评 考查介词短语．
relief是relieve的名词形式，减轻痛苦等意思．
release名词做释放，发行等意思；动词做发行，放出等意思
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