试题题干
I wrote a letter to the car dealer,（ ）what had happened to my net car.
参考答案
正确答案：
试题解析
分词作状语和主语找关系。我解释了，是主动，所以用现在分词。
I wrote a letter to the car dealer,（ ）what had happened to my net car.
分词作状语和主语找关系。我解释了，是主动，所以用现在分词。