题目内容

【题目】 has Jack been studying English?

—Since he was seven years old.

A. How long B. How often

C. When D. While

【答案】A

【解析】

试题分析:句意:捷克学英语多长时间了?自从他7岁起。How long多长; How often多久一次;When提问何时,根据答语Since he was seven years old.可知是一段时间,结合句意,故选A

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