留美老师带你每天说英文 第245期:人们开始犯瘾时会发生什么

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台湾籍旅美老师今天交给我们的句子是：

By the way, what do you think happened when people started craving drugs?
顺带一提，那你们认为如果人们开始犯瘾时会发生什么事?