34. What does the author want to convey in the last paragraph?
A. We should be cautious about river management. B. We should protect plants along rivers.
C. We’d better seek more help from plants. D. We’d better move upstream to live.
35. What is the best title for the text?
A. What Humans Do with Rivers
B. How Rivers’ Transporting Carbon Counts
C. What the Carbon Cycle Means to Us
D. How Living Downstream Affects the Earth

答案
32.A      33.C      34.A      35. B