1. Oh no! The children___(have been cooking). Look at the state of this kitchen!
2. How many times has Wendy___(been) late for work this week?
3. I'm going to give that cat some food. It___(has been sitting) on the doorstep for hours.
4. I___(have been doing) grammar exercises all morning. I deserve a treat for lunch.
5. You___(have not bought) your mother a present? That's really mean of you.
6. She___(worked) in Austalia for 2 years. Then she moved.
7. Now where are my keys? This is the third time I___(have lost) them today.
8. Have you___(ever\played) chess? You should try it. I'm sure it's the sort that you'd like.
9. Oh do be quiet. You___(have been grumbling) all day!
10. Your tennis____(has really\improved)! Have you___(been practicing) in secret?