问题
单项选择题
One Friday, we were packing to leave for a weekend away（）my daughter heared cries for help.
A. after
B. while
C. since
D. when
答案
参考答案：D
解析：
根据句意可知，此处表示“当……时候”，故用when。
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One Friday, we were packing to leave for a weekend away（）my daughter heared cries for help.
A. after
B. while
C. since
D. when
参考答案：D
解析：
根据句意可知，此处表示“当……时候”，故用when。