Really? When I was in, I didn't know anybody who would dare question the bible either.
You can bring up questions like, "I don't get it, how could Noah have fit all the animals on the ark?"
Or "The sun standing still for Joshua doesn't make sense. What, did the earth stop turning for a whole day?"
You can ask questions like this without being suspected of apostasy, but if you bring up any doubts or questions about the governing body being God's one true channel on earth, you will raise red flags and be a target of suspicion for apostasy.