Read and listen to the text. Write dates before the following statements (Đọc và nghe văn bản. Viết ngày trước các câu sau) 1. … The world celebrated the 100^th anniversary of the first heavier-than-air craft. 2. … The first airplane took off. 3. … Léon Delagrange became the first flight passenger. 4. … The first scheduled air service began.