. Only in a foreign-funded enterprise the importance of learning English well.A. when I

问题补充：

. Only in a foreign-funded enterprise the importance of learning English well.

A. when I worked, I realized

B. when I worked, did I realize

C. when did I work, did I realize

D. when did I work, I realized

答案：

A. when I worked, I realized

(答案→)B. when I worked, did I realize

C. when did I work, did I realize

D. when did I work, I realized

解析：考查倒装句。当only位于句首时，主句用部分倒装，从句内容不受影响，故选B。