What if time travelling was possible

Then that will be a big big invention  and you will be able to be travel back to places that not even scientist couldn't understand.

Explanation:

Then I would try to fix everything I messed up in the past and try not to mess stuff up in my future. Plus, that would be pretty cool if people could time travel.

Explanation:

the answer is irony!

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.