英语牛人请进，解释一道高中题，谢谢！

Question

1.My boss was very angry when his car broke down again , ________ at the garage only a week before.
B.having serviced it C.having had it serviced

A.D两选项我已经排除。可我有疑问：
后面逗号开始，可以填because he had serviced it ，删去because和he，就成having serviced it，这样就选B，
但后面逗号开始，如果填because he had had it serviced，删去because和he，就成having had it serviced ，这样就选C，
请问：这题应选择什么？为什么？解释一下，谢谢！

Answer 1

.having had it serviced （已经让人对它进行了维修）, 这是分词结构，动作发生在he was angry以前，所以就用完成式的分词结构== for he had had it serviced （这是原因状语从句）

have sth done ------使sth被做追问

那请问您，我说的填because he had had it serviced对吗？还是您所说的for he had had it serviced？

追答

你好。 for he had had it serviced 与because he had had it serviced 都是对的。我的是附带说明，而你的是强调说明。

Answer 2

选C，此题考查非谓语，SERVICE 的动作发生在前面WAS ANGRY 之前，所以用完成，并且关系是主动的，后面HAVE STH DONE，使某物被怎么样。