in和in the有什么区别

in the past 和in the last有什么区别? in the country和in the countryside有什么区别? in the USA 和 in Ameirica有什么区别 in common 和 in the common 有什么区别 in school和in the school有什么区别 in town 和in the town有什么区别 in the week和in a week有什么区别? in summer和in the summer有什么区别? in hospital 和 in the hospital 有什么区别吖? 英语 in hospital.和in the hospital 有什么区别 in the future和 in future有什么区别 in North 和 in the North 有什么区别