What has many keys but can’t open a single lock?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Do You See It?

Riddle me this, Riddle me that,
What am I? I am made of wood, but you can't see me down?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

I don't get anymore wetter, no matter how much rain falls on me.

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?