When I saw his pale face, I ________ what ________. [ ]
A. realized, had happened
B. was realizing, was happening
C. realized, has happened
D. has realized, had happened
答案:A
When I saw his pale face, I ________ what ________. [ ]
A. realized, had happened
B. was realizing, was happening
C. realized, has happened
D. has realized, had happened
答案:A