1. A: There
are
so many cars in the street.
B: Yes. Smoke
from
cars
makes
the air dirty.
A: And cars use a lot of
energy
.
B: But there's
not
much energy
on
Earth.
A: Then what should we
do
?
B: We
should
drive less.
A: Your idea
is
great.
2. A: Look! The boy is
brushing
his
teeth
.
B: But he's wasting too much
water
.
A: Yes. There
isn't
much water in many places.
B: You're right. We should
save
and reuse it.
答案：1. are，from，makes，energy，not，on，do，should，is
2. brushing，teeth，water，isn't，save
六、阅读短文,完成表格。
Look at the blue Earth. It is our home. There are plains(平原),mountains,
rivers
,lakes and oceans(海洋) on it. There are trees,flowers and
grass
on it too. There are many kinds of wild(野生的)
animals
living together with us. But sometimes we do bad things to our Earth. We waste too
much
water. We
Cut
down too many trees. We hunt(捕猎) too many wild animals for
food
and clothes. We waste too much energy. Too many cars use a lot of energy. We use too many
plastic
bags. We shouldn't do these things. We should protect our Earth because we have only one Earth.
答案：1. rivers 2. grass 3. animals 4. much 5. Cut 6. food 7. plastic
