These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

Which is the smallest number that you can write using all the vowels exactly once?

What has to be broken before you can use it?

What do you answer even though it never asks you questions?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

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

What does Alexander the Great and Winnie the Pooh have in common?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?