Find one word that can fill in the blank of the three given sentences.

Example:

0…..deep….

a.He falls in a………..sleep and wakes up with a head full of revelations.

b.She had reached a………..understanding of the local culture.c.He is often so………..in his books that he forgets to eat.

.………..

a.We’ve asked the neighbors to keep a/an……….. on the house for us while we're away.

b.The authorities were either unaware of the problem or they turned a blind………..to it.

c.He bought the warehouse with a/an………..to converting it into a hotel.