1. A: There
B: Yes. Smoke
A: And cars use a lot of
B: But there's
A: Then what should we
B: We
A: Your idea
2. A: Look! The boy is
B: But he's wasting too much
A: Yes. There
B: You're right. We should
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
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,
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 andgrass
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 toomuch
water. WeCut
down too many trees. We hunt(捕猎) too many wild animals forfood
and clothes. We waste too much energy. Too many cars use a lot of energy. We use too manyplastic
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