It’s very kind ______ you to show me the way.
The company was set up _______. My father has been working in it for nearly thirty years.
We should pay more attention ______teenage problems.
______he was exercising at the park yesterday morning, he found a purse under the tree.
There is ______ university in the east of the city and ______ university is big and modern.
—Mom, this is my friend, David. — .