问题
选择题
— So you were in the supermarket _____ you heard a strange sound, right?
— That's true. I ran out as quickly as possible. [ ]
A. when
B. while
C. then
D. which
答案
答案：A
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— So you were in the supermarket _____ you heard a strange sound, right?
— That's true. I ran out as quickly as possible. [ ]
A. when
B. while
C. then
D. which
答案：A