【题目】There have been many advances in medicine in recent years. That means money ______ for medical research has been well spent.
A.usedB.usingC.to useD.to be used
在线课程【答案】A
【解析】
考查过去分词。句意：近年来医学取得了许多进展。这意味着用于医学研究的钱花得很值。分析句子可知，money与use在逻辑上是被动关系，所以用过去分词作后置定语。故选A项。