单项选择题 The annual population growth rate of the 1990s was （）

单项选择题 In（）each year the National Film Theatre hosts the London Film Fes-tival,at which some 250 new films from all over the world are screened.

单项选择题 Edinburgh International Festival of Music and Drama takes place for a period of 3 to 4 weeks between（）when Edinburgh becomes a center of cultural activity.