Đ3. Khoanh tròn đáp án đúng. 1. His mother hasn't prepared the meal (already)yet) 2. Tommy (worked/has worked) for this company for 10 months but now he doesn't work here. 3. This machine (has worked/ worked) for ten years so far. 4. Mr Vu (have found/ founded) this non-profit organization to benefit the local community. 5. Jame's (not been/not)a member of the volunteer club since he left school. 6. Her husband (has given up/gave up)smoking when they had their first child. 7. (Have you read Did you read) this book yet? 8. I lost my key on my way home last night. Up to now I (didn't find/haven't found) it. 9. You (have lied/have lain) in bed since the morning. Get up and find something else to do. 10. They (were/have been) close friends for 3 months but now they hate each other. 11. (Have you ever tried/Did you ever try) ice skating when you were a kid? 12. How long (have you taught/ did you teach) in this primary school? 14. You (have eaten/haven't eaten) anything since yesterday. You must be very hungry now. 13. The last time we met (has been/was) ten days ago.