There are many different ways _______ comparing the economy of one nation _______ that of another.

Peter promised to come here _______ 9 o’clock _______ Monday morning

He was listening _______ the announcements broadcast _______ the radio.

I often busy _______ weekdays and free _______ the weekend.

John was born _______ March 1st, 2000. He was to school _______ 2006 when he was _______ the age of six.

She retired early _______ account _______ ill health. Now, she lives _______ retirement.

Peter has worked for our company _______ 1999, _______ nearly ten years. _______ the time, he has been working very hard.

At first I was very angry _______ his behaviors but later when he apologized _______ doing like that I forgave him.