问题
选择题
One Friday, we were packing to leave for a weekend away _____ my daughter heard cries for help. [ ]
A. after
B. while
C. since
D. when
答案
答案：D
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One Friday, we were packing to leave for a weekend away _____ my daughter heard cries for help. [ ]
A. after
B. while
C. since
D. when
答案：D