When was the first Earth Day celebated?

When was the saying first used?翻译 When was the first Earth Day celebated? when was the first computer （i ）in the world When and where was the first Olympic Games held? when was the saying first used?要答句还要翻译. When was the first modren Olympic Games held? when was the very first American Thanksgiving celebrated when and where was the first olympic ganes heald When was the first April Fool's Day begin? when the first time he was in japan was连词成句 The little girl was very frightened when she saw the f___ snake for the first time I'm here could tell me______,please A.when does the first bus arriveB.when the first bus arriveC.when did the first bus arriveD.when will the first bus arrive I'm here could tell me______,please A.when does the first bus arriveB.when the first bus arriveC.when did the first bus arriveD.when will the first bus arrive when was the last time you did something for the first time中文翻译 英语翻译when was the last time?you did something for the first time? The teacher was very ____(please)when we won the first prize.填什么? When he was 10 years old,he______on the stage for the first time怎么填 英语翻译the first felt sorry for not having travelled when he was young.