单项选择题According to the passage, the age range of some businesses’ customers may be limited because of ______.
单项选择题The belief that education is indispensable to all children ______.
单项选择题Which of the following adjectives best describes the concept of art imposed by the triumph of Modernism as the author represents it in paragraph 2
单项选择题According to this passage, Environmental Protection Agency ______.
单项选择题The word revive in the passage 2 meant that ______.