책장 · 리스닝Hypothetical Situations假设情景B2 중고급 · EnglishJoy Studio · B2EpisodesIf You Had One Extra Hour — 假如多一小时If the Plan Failed — 假如计划失败If You Moved Abroad — 假如移居国外Advice in Hypotheticals — 假设中的建议Using If Naturally — 自然使用假设