Answer:
What must be looked through in order to see?
You can have it, and be at it, But it never lasts forever.
Makes dough grow
Never ahead, ever behind, yet flying swiftly pastΝΎ For a child I last forever, for adults I'm gone too fast.
These are needed to finish a test
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?