问题

Only ______ as a translator ______ how important it was to grasp English.
A:when did I work; I realized
B:when did I work; did I realize
C:when I worked; I realized
D:when I worked; did I realize
B:when did I work; did I realize
C:when I worked; I realized
D:when I worked; did I realize
正确答案是: