从方框中选择最佳选项完成对话，有两项多余

a. The smoke created by the factories goes into the air every day.

b. The air here is much more polluted than that in my country.

c. We needn't worry about the problem.

d. I don't believe that any single country can do anything about it.

e. The environment problem is more serious than before.

f. What methods do you use to solve it?

g. Let's protect our home together.

A: I think the biggest environment problem in my country is air pollution.

B: Yes, I agree.{#blank#}1{#/blank#}Of course, my country has much less industry.

A: There are so many factories and cars.{#blank#}2{#/blank#} And the number of cars is bigger than before.

B: The problem is now on a truly global scale.{#blank#}3{#/blank#} 

A: I think you're right. Our earth is in danger now.{#blank#}4{#/blank#} If we don't protect it together, the future will be hopeless. It needs all the countries in the world to deal with this problem.

B: Yes.{#blank#}5{#/blank#} If everyone does some things for the environment, I hope we can have a better life.