问题
选择题
. 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
答案：B
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。