Good Riddles

Question: I always wait unit you're off guard or get older so you can become easier to attack. Once your body is weak, I strike inside you and try to kill you. What am i

Question: What on a woman grows once married?

Question: I was always in the beginning of time but faded as time passed by. When people use me in a sentence they never forget to use good grammar. When people play dice with me they never win against me but I hate gambling. When people find me they always get a heart of a lion. Who am I?

Question: How do you spell mousetrap with three letters?

Question: What goes up white and comes down yellow?