about reading comprehension passage

Hello Sir
I would like to clear my doubt about readig comprehension passage. I am teaching online english to students who are preparing compitative exam. I want to prepare question paper for them in reading comprehension section. But my doubt is that from where i should get passage. Whatever article or repot i select from any source they are copyright. Can i use them or please suggest free resources to me.
Thanks
Regards
Pankaj