两个句子合并,用定语从句表达,请看看哪句正确

题目

两个句子合并,用定语从句表达,请看看哪句正确
The movie is interesting.I saw the movie last night.合并为定语从句,下面两句,哪一句正确?
i saw the movie which was interesting last night
the movie which i saw last night was interesting.

答案

第一句语法上没有错
但没有人会那样说
最好的说法是
the movie I saw last night was interesting.
建议增强一下语感.不用经过什么分析的.