Put the verbs in brackets into the present perfect or the present perfect continuous. 1. Don't walk in there! I (just/clean) the floor. 2. Jane's hungry. She .. (not/eat) anything for six hours. 3. She is tired. She ...(study) for four hours. 4. I don't want to see that film again. I (see) it twice already. 5. Sandy ...(teach) English for ten years. 6. Chris (not/do) the washing-up yet. 7. He ....(work) all morning. 8. They ... (play) in the garden for two hours.