Answer:
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?
I have a straight back and sharp teeth to cut objects.
What invention lets you look right through a wall?
I get paid to shoot people then blow them up.
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.