1. We should not cut down 
too many
 trees.  
2. There is not 
much
 water in 
many
 places.  
3. The Earth is 
our
 home.  
4. Let 
me
 draw.  
5. We have 
fun
 in the classroom.
答案:1. too many 2. much, many 3. our 4. me 5. fun
Liu Tao: People are 
using
 wood 
to
 make
 tables and chairs.  
Su Hai: The wood 
comes
 from
 trees.  
Su Yang: Trees can also keep the air 
clean
.  
Liu Tao: Yes, the trees are important(重要的) to us.  
Su Yang: So we should not 
cut
 down
 too many trees.  
Su Hai: You’re right and we can 
plant
 more trees.  
Liu Tao: That’s a great idea! Let’s do it.
答案:using, to make, comes from, clean, cut down, plant
(
T
) 1. Water is very important to people.  
(
F
) 2. We can live without water.  
(
F
) 3. Water is everywhere around us. It’s not very important.  
(
T
) 4. If we don’t save water, the last drop of water on Earth will be our tears one day.
答案:1. T 2. F 3. F 4. T