3 在上下文中寻找线索
有时候对话中的因果关系没有得以明确表达，而需要听者通过上下文的线索去进行综合推断。
Example You will hear：
Man：You have been getting back from lunch late every day.You do your shopping，don’t you？
Woman：No.Ispend most of my lunch hour at the library，but it’s so quiet that Ifall asleep.
Question：Why does the woman come back late from lunch now？
You will read：(https://www.daowen.com)
A.She goes home for lunch.
B.She spends her time shopping.
C.She gets interested in what she is reading.
D.She doesn’t wake up in time.
女士说自己把大部分午饭时间花在图书馆，但那里太安静以至于她睡着了，由此可以推断，女士之所以回来迟了是因为睡过了头，所以正确答案应为D项。