What can you catch but never throw?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

You can see it everyday, But cannot touch it at will. What is it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What goes up but never comes down?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

Can you name some countries which do not have the alphabet 'A' in them?