(C)
Some people say we need 
to plant trees in places
where rock concerts or
conferences are held in
order to absorb the carbon
dioxide created by the
event. This picture shows
how trees can help.
Photosynthesis （光合作用）
①Photosynthesis takes place
when there is sunlight.
② Carbon dioxide in air enters
the leaves through tiny holes
called stomata ( 气孔).
③ Leaves contain chlorophyll
( 叶绿素 ) which traps the
sun's energy.
④ Plant's roots gather water
from the soil.
⑤ Leaves use chlorophyll and
sunlight to change the water
and carbon dioxide into food,
or sugar, for the plant.
⑥ Oxygen is released into the air.
63. According to the passage, which of the following plays an important part in catching the sun's energy?
A. Roots     B. Branches     C. Leaves          D. Trunks         
64. What is the best title of the diagram(图表)?
A. How trees absorb carbon dioxide?            
B. How the air can be made cleaner?
C. Trees play an important part in our daily life.    
D. How trees get food in the soil?
65. What can be inferred from the passage?
A. the food for trees is made from the water and sugar in the soil
B. photosynthesis can't take place at night    
C. photosynthesis can take place at any time
D. trees help little in improving the air conditions
66. According to the passage, where should more trees be planted?
A. near the river                    B. near the cinema
C. along the highway                D. on the mountain