How long has he ___(find;change;got;had) the job?

How long has he ___(find;change;got;had) the job?
How long has he ___(find;change;got;had) the job?

How long has he ___(find;change;got;had) the job?
答案是had
现在完成时的结构：HAVE / HAS + 动词过去分词； 排除FIND,CHANGE ,而GOT是终止性动词不能与HOW LONG 连用.
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