问题补充:
Was it in the factory you worked five years ago you learned the technique?
A. that; where
B. where; when
C. where; where
D. where; that
答案:
A. that; where
B. where; when
C. where; where
(答案→)D. where; that
解析:从整个句子来分析,本题的主干是Was it in the factory you worked you learned the technique?这一强调结构,you worked five years ago 是定语从句,限定the factory。