Where can you find and read this passage? In ______.

(单选题)17. （ ） (单选题)16. （ ） (单选题)15. （ ） (单选题)14.（ ） (单选题)13. （ ） (单选题)12. （ ） (单选题)11.（ ） (单选题)Never before ______ in greater need of modern public transpo (单选题)It is generally believed that teaching is ______ it is a sci (单选题)Seldom ______ in summer, nor ______ in winter in dry areas.