What goes up but never comes down?

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

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

What occurs twice in a week, once in a year but never in a day?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What does this rebus means ?

PROG WORKRESS

what one word does the below rebus identifies?

What is the next number in this series?

4,12,84,3612....

Which English verb becomes past tense just by rearranging the letters?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?