Read and Listen To Sentences Using the Word
- We have a good heating system.
- There is an urgent need for a new system.
- Our dorm's heating system isn't working properly.
- There is an urgent need for them to update their system.
- I think it wouldn't be too hard to come up with a better system.
- The ancient Greeks knew as much about the solar system as we do.
- I'm sure it wouldn't be too hard to find out who hacked into our system.