他每天步行到学校大约需要二十分钟。
It takes him about 20 minutes to _ go to school on foot every day.
警察：这路公共汽车不能直达。您要换两次车。我建议您步行去。不到二十分钟就到了。
Policeman : This bus doesn't take you directly there. You'd have to change buses twice. I suggest you walk. It'll take you less than 20 minutes.
警察：这路公共汽车不能直达。您要换两次车。我建议您步行去。不到二十分钟就到了。
Policeman : This bus doesn't take you directly there. You'd have to change buses twice. I suggest you walk. It'll take you less than 20 minutes.
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