问题
选择题
Good friends as we are, I still find her difficult to understand ________. [ ]
A. at times
B. at a time
C. at one time
D. at the time
答案
答案：A
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Good friends as we are, I still find her difficult to understand ________. [ ]
A. at times
B. at a time
C. at one time
D. at the time
答案：A
