Well, there are some different choices on some of these, but here goes:
Your books are kept on the top shelf.
I will not hide the truth from you.
She was angry (at, or with) me for nothing.
This is the man to whom I gave the parcel.
The boys walked to the roundabout.
She went up the escalator to reach the fourth floor.
They were throwing a ball at each other.
He met with an accident during the flyover.
The boys kept their bikes against the wall and went to play.
The baby was crawling toward his mother.
On some of these sentences, choosing a different preposition could change the meaning. For example, in the first one, you COULD say:
Your books are kept underneath the first shelf.
In the last one, you COULD say:
The baby was crawling away from his mother (you would have to add an adverb, "away" though).
Good luck on your exam.