they are talking about where to go for a holiday,同意句,they are talking about where they go fora holiday.

问题描述:

they are talking about where to go for a holiday,同意句,they are talking about where they go for
a holiday.

正确的表达是:
They are talking about where to go for a holiday,
== They are talking about where THEY WILL / CAN go for a holiday,