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进行一次学校旅行: be on a school trip;go on a school trip be on a school trip你们多久进行一次学校旅行?How often do you have a school trip. 我们在进行一次学校旅行.We're on a school trip. 进行一次学校...
进行一次学校旅行: be on a school trip;go on a school trip be on a school trip你们多久进行一次学校旅行?How often do you have a school trip. 我们在进行一次学校旅行.We're on a school trip. 进行一次学校...