2 . 听下面一段较长对话，回答以下小题。
1. What are the speakers talking about?

A．Environment protection.

B．Public transportation.

C．A birthday party.

2. How does the man usually go to work?

A．By bus.

B．By car.

C．By bike.

4 . 听下面一段较长对话，回答以下小题。
1. Why does the woman plan to wear a mask tomorrow?

A．Because of the smog.

B．Because of her illness.

C．Because of the cold weather.

2. What’s a big problem in the city?

A．The heavy traffic.

B．The air pollution.

C．The large population.

3. What do the speakers decide to do?

A．Change their ways to go to work.

B．Ask the government to do something.

C．Call on people to protect the environment.

4. What can we know about the man?

A．He always uses the public transport.

B．He seldom listens to the weather report.

C．He is waiting for the weather to improve soon.

6 . What are the speakers talking about?

A．How to lead a low-carbon life.

B．Where to buy household goods.

C．Which electrical equipment saves energy.

7 . 听下面一段较长对话，回答以下小题。
1. Why does the woman plan to wear a mask tomorrow?

A．Because of the smog.

B．Because of her illness.

C．Because of the cold weather.

2. What’s a big problem in the city?

A．The heavy traffic.

B．The air pollution.

C．The large population.

3. What do the speakers decide to do?

A．Change their ways to go to work.

B．Ask the government to do something.

C．Call on people to protect the environment.

4. What can we know about the man?

A．He always uses the public transport.

B．He seldom listens to the weather report.

C．He is waiting for the weather to improve soon.

8 . 听下面一段独白，回答以下小题。
1. What happened to the Cuyahoga River in 1969?

A．It was cleaned up.

B．It was seriously polluted.

C．It became the most outstanding river.

2. How long did it take for the river to become clean?

A．A few months.

B．Several years.

C．A few days.

3. What can make the river clean according to the speaker?

A．Hard work.

B．Something imaginable.

C．The control of using your credit card.

4. What shall we do when facing an impossible situation?

A．Wait for something to change.

B．Imagine something outstanding.

C．Just be patient and do something.

9 . What is the man’s suggestion about serious pollution?

A．Don’t breathe the poisonous air.

B．The government should take action.

C．The government should protect the environment.

10 . 听下面一段较长对话，回答以下小题。
1. What did the man think of Americans?

A．Health-conscious.

B．Ignorant.

C．Lazy.

2. Why does the man mention organic foods?

A．To show how influential American food culture is.

B．To show how people’s attitudes have changed.

C．To show that Americans are spending more on food.

3. According to the woman, why are things different now?

A．People have access to more information.

B．People are more active in general.

C．People are more positive.

4. What does the woman try to avoid?

A．Watching too much TV.

B．Eating fast food.

C．Driving her car.