7. ,just)hoskey with their partners. 8.) a grammar exercise now. 9.tom )books this year ? 10.she )the exercise an hour ago. 11. my grandfather )at the circus when )young. 12. don't ask him any questions now. )

7. The boys have just been playing hokey with their partners.
8. She is doing a grammar exercise now.
9. Is Tom reading books this year ?
10. She did the exercise an hour ago.
11. My grandfather worked at the circus when he was young.
12. Don't ask him any questions now. He is working.