Present Perfect, Past Simple или Present Perfect Continuous. 1.Oh no! The children _______ (cook). Look at the state

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\'s been sitting on the doorstep for hours. I’m sure it’s starving. 4. I\'ve been doing grammar exercises all morning. I deserve a treat for lunch. 5. Haven\'t you bought your mother a present? That’s really mean of you. 6. She worked in Australia 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\'ve been grumbling all day! 10. Your tennis has really improved! Have you been practicing in secret?