I. Put the verbs in brackets into Present Perfect Simple or Present Perfect Continuous

1. Don't walk in here. I have just cleaned the floor. 2. Jane is hungry. She hasn't eaten anything for six hours. 3. She is tired. She has been studying for four hours. 4. I don't want to see that film again. I have seen it twice already. 5. Sandy has taught English for 10 years. 6. Chris hasn't done the washing up yet. 7. He has been walking all the morning. 8. They have been playing in the garden for two hours.