Translation of signo de interrogación

If someone tells me to try a delicacy I won't eat it although I have never tried it. It took me twenty year to try Sushi and yes I love it. My friends tell me that I am conservative and stubborn.
The climb was much exhausting than I had presumed. I had forgotten that we were at high altitude where there is less oxygen and that every step required double effort. It was a great exercise.
The door of the car was still open, so that he could not drive away. Luckily, two foreigners walked by and we were asking them to help us out. They payed for us and warned us that these situations were common.