3. Order the words to make sentences.
1. or we / stop using fossil fuels / we should / to breathe will have no fresh air
2. we ought / using coal / pollutes the air / to stop / because it
3. an effective source / but / nuclear power is / very dangerous / of energy / it is
4. look for / we will have / we should / alternative sources of energy / and / a better environment
5. an effective source / although / nuclear power is / very dangerous / of energy / it is
Bài Làm:
1. We should stop using fossil fuels or we will have no fresh air to breathe.
2. We ought to stop using coal because it pollutes the air.
3. Nuclear power is an effective source of energy but it is very dangerous.
4. We should look for alternative sources of energy and we will have a better environment.
5. Although nuclear power is an effective source of energy, it is very dangerous.