It's their fourth week here. -
I hear this for the third time. -
It's the seventh day of my holiday. -
I have the third lesson today. -
"O" is the fifteenth letter of the alphabet. -
He saw her for the first time. -
I cook this pizza for the tenth time. -
This is his thirteenth message. -
Thursday is the fourth day of the week. -
This writer lived in the twentieth century. -
Her shop is the third to the left. -
You tell me this for the tenth time! -
What is the twenty-second letter of the alphabet? -
I finished my first book! -
We go to New York on the sixteenth of January -
This is not the thirtieth floor. -
This is the fiftieth floor. -
My second dress is more beautiful. -
This is my first pet. -
He doesn't like my second wife. -