Answer:
I hold two meanings. With one I may be broken, with the other I hold on. What am I?
I have a straight back and sharp teeth to cut objects.
The last woman on Earth received a phone call. Who was the caller?
Every night I'm told what to do, and each morning I do what I'm told. But I still don't escape your scold. What am I?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
Why did the stadium get so hot after the game?