In one’s right mind
Rational and sensible.The girl was not in her right mind to quit her job right now.
In one’s prime
At one's peak or best time.My cousin was in his prime when he entered the bicycle race.
In remission
A disease that seems to be getting better.The cancer of my neighbor's mother has been in remission for several months now.
In rehearsal
Developing or practicing for a play or opera or concert.The play has been in rehearsal for two weeks.
In recent memory
The recent period of time in which you can remember things.In recent memory, our football team has never been as strong as it is this year.
In receipt of (something)
Having received something.I am in receipt of an order from the city to cut down a tree in our backyard.
In reality
Really.The woman said that she wants a job but in reality I do not think that she wants to work.
In rags
Dressed in worn-out and torn clothing.The man standing outside the restaurant was in rags.
In pursuit of (something)
Chasing after something.The young man has been in pursuit of his dream of becoming a doctor for a long time.
In public
In a place or in a way where other people can see.People are not allowed to smoke in public in many places.