英语选择题：Cindy finished her studies when she was twenty-two.The
英语选择题：Cindy finished her studies when she was twenty-two.The " when she was"means _______.
A. at the age
B. while she was
C. during the time
D. when she reached
A. at the age
B. while she was
C. during the time
D. when she reached
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