Here’s another useful idiom which you can naturally introduce into your IELTS speaking test which will help to ensure you score highly for lexical resource.
If you are asked about your opinion on something and you don’t have a strong viewpoint or you are simply indecisive you can use this phrase in the following way:
I usually sit on the fence when my friends argue about raising taxes so that students don’t have to pay their own university fees. I can see both sides of the argument.
You can also use it when describing other people or institutions:
The government in my country invariably sit on the fence when it comes to major decisions about public transport. Nothing ever seems to get done.