4．There will be a v___________ of events in Beijing 2008 Olympic Games.

3．No one is certain of the exact number of passengers a___________ the Titanic.

2．Australia provides its visitors with a f___________ for the eyes.

根据所给汉语提示或首字母用适当的单词完成句子。(每空只写一个单词)

1．Topics in this book vary, r___________ from Scientific Achievements to Freedom Fighters.