题目内容：

一道SAT阅读题
though judd is typically diffident and reserved in social gatherings,at last night's reception he spoke and acted with uncharacteristic aplomb.
为什么要填diffident 和aplomb?这两个词不对应啊!

优质解答

diffident and reserved: 害羞、内向
aplomb：自信、沉着
讲得过去啊