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A：What are you doing,Kitty?
B：(1)
A：(2)
B：It's about trees. Do you know anything about trees?
A：Yes. Trees are important to us. We can get fruit from trees. (3)
B：Good. Then what do we use wood for?
A：(4)
B：Yes,it is. But people cut down too many trees to get wood every year. The Earth gets sick now.
A：(5)
B：We should stop cutting down so many trees,and we should plant more trees every year.
B：(1)
D
A：(2)
B
B：It's about trees. Do you know anything about trees?
A：Yes. Trees are important to us. We can get fruit from trees. (3)
F
B：Good. Then what do we use wood for?
A：(4)
A
It's very useful.B：Yes,it is. But people cut down too many trees to get wood every year. The Earth gets sick now.
A：(5)
E
B：We should stop cutting down so many trees,and we should plant more trees every year.
答案
(1) D
(2) B
(3) F
(4) A
(5) E
(2) B
(3) F
(4) A
(5) E
