问题
选择题
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
答案：A
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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