问
____ a few minutes the trees were on fire.
A. During B. Before C. For D. Within(上海高考,92-42)
答案为 D。但是,我一直没有搞清 within 与 in 的区别。拿下面的句子来说,其中的 within 能否用 in 来替换呢?
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I warned the girls not to touch anything and told them I would be back within a few minutes. (上海会考,96-36)
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If this is not done within five minutes, the person will die.
答
可以用 in 来替换, 见 in/within。