If you want to mention both sides of the argument for an "agree or disagree" question, try including a while sentence in your introduction.
Heres the while sentence formula:
"While I accept argument A, I favour argument B"
Heres an example question:
Early technological developments helped ordinary people and changed their lives more than recent developments. To what extent do you agree or disagree?
Heres my introduction:
Technological progress has taken place throughout the course of human history. While early technologies certainly changed the lives of normal people, I believe that recent breakthroughs have had an even greater impact.
The while sentence makes it clear that I favour one side of the argument, but it allows me to mention both sides in the main body of my essay.