听下面一段较长对话,回答以下小题。
13. What lead (s) to worse environment according to the man?
A.Natural disasters. | B.Large population. | C.Various types of pollution. |
14. What is the man?
A.A student. | B.A librarian. | C.A teacher. |
15. What does the man believe the environment be like one day?
A.Beautiful. | B.Terrible. | C.Strange. |
16. How many pages has Jack left to read?