A visit to Sydney had long been my dream. So I was ____ (excite) when offered the opportunity to go. I arrived ____Sydney around 9:00 a.m. After ____(check) in a lovely apartment, I headed to the seaside and couldn't resist ____ (enjoy) the beauty of Sydney. Sydney is famous for its many beautiful ____ (beach). Among them, Manly, ____ is located on the north part of Sydney, is ____ (probable) the biggest one. If you go there, you can not only see the Manly Ferry from the Circular Quay ____ also enjoy very beautiful scenery of the Sydney Opera House and Harbor Bridge along the way. If you like surfing, Bondi Beach is a perfect place to go, although it is actually____(small) than Manly. Apart from the beaches, you can take a visit to the Royal Botanic Garden to admire the view of the harbor or visit the Art Galley to appreciate the works. You will find your interesting tourist attractions here. Definitely, Sydney is so ____ (fascinate) that it is worth going.

在2H₂+O₂点燃2H₂O的反应中，H₂、O₂、H₂O的质量比为____，若要生成27 g水，需要____g氧气和____g氢气才能恰好完全反应。