We go to New York on the sixteenth of January -
Tomorrow is her sixtieth birthday. -
John is my first love. -
"O" is the fifteenth letter of the alphabet. -
This is the thirty-third time you tell me this story. -
I hear this for the third time. -
This writer lived in the twentieth century. -
He travels alone for the first time. -
This is the fiftieth floor. -
It's your sixth hour here. -
I don't like her third husband. -
Mark is his fourth son. -
He watched the first film. -
He lives on the eightieth floor. -
He tries it for the eleventh time. -
My parents bought the second flat. -
My birthday is on the nineteenth of January. -
Thursday is the fourth day of the week. -
He took the twenty-third place. -
Is this the eightieth floor? -