______ when he was young, he would have a good job now.

What do you think of maths?–My favorite. It’s ______ for me to study of all the subjects in school.

Where is my pen?It’s_____ pencil-box. [ ]

Can you see the boys _____ football on the playground? They are my classmates.

Have you returned the book to the library _______? –Yes, I have ____ returned it.