English preposition exercises

English preposition exercises. Choose the right prepositions at or by to complete the following sentences.
One could tell his looks that he was tired.
"Hamlet" was written Shakespeare.
It is useful to have all one's reference books close hand.
She looked him.
They arranged to meet the theatre tonight.
I will have finished this work Saturday.
Tell me least one thing.
You won't find him home; he is gone out.
He should have more sense than that his age.
All this work is done hand.