ПОМОГИТЕ ПОЖАЛУЙСТА!!!!

1. If I get a good job, I’ll earn a lot of money.
I won’t earn a lot of money unless I get a good job
2. If people live a lot longer, our planet’ll be full.
Our planet won’t be full unless people live a lot longer
3. If we use computers more and more, we’ll pay more for electricity.
We won’t pay more for electricity unless we use more computers more and more