Explanation

Use of Through.

From one end or side of something to the other. we walked slowly through the door.

Use of IN

When something is located inside of a defined space. Like window, glass, box etc. Space does not need to be closed on all sides.

Explanation

We use preposition under to indicate beneath of something. 

I hide it under the table. 

Explanation

 "The cat is hiding under the table."

"under" correctly describes the position of the cat beneath the table.

(a) in – means inside something (e.g., in the box)

(b) on – means on top of something (e.g., on the table)

(d) between – used when referring to something in the middle of two objects

Explanation

We use preposition since for parts of days.

Since morning, since evening, since afternoon, since midnight etc. 

Explanation

The destiny has destined him for a high post than he now holds.

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Explanation

We use of when we want to show that people or things relate to other things or people.

Explanation

Based is generally followed by on.

Explanation

They want to hear the end of the story.

Explanation

Use the preposition 'to' when indicating that there is movement from one place to another.

Explanation

The complete phrase is "Life is not a bed of roses."

The phrase "of" is followed by "roses" to indicate that life is not a comfortable or luxurious experience akin to lying in a bed of soft roses.

Instead, it suggests that life is often difficult and filled with challenges.