Trong mặt phẳng oxy cho 3 điem A(2,1) B(-2,5). C(6,3) a) viết phuong trình tham số cua đoạn thẳng BC b viết pt tham số cua trung tuyếnnAM

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I. Put the verb in the bracket into the past simple or present perfect tense. 1. My brother is a writer. He (write) _____ 10 books. 2. I (not have) ______________ a holiday in 2012. 3. He (play) _______________ badminton yesterday. 4. __________________ (she/be) to Sa Pa? -Yes, she has. 5. Dalat is the most beautiful city I (visit) __________ . 6. What time (you/go) ____ to the beach yesterday afternoon ? 7. Sa Pa is great. ____ you (be) ___________ there? - Yes, I have. 8. Where _______ (you/go) _______ there? - I (go) ______ there last month. 9. How long _______ Tina (be) ______ in Italy? 10. What (you/watch) ____________ on TV last night? II. Rewrite the sentences with the same meaning. 1. The last time we saw her on Christmas Day. → We haven’t ………………………………………………………………………. 2. I have never eaten this kind of food before. → This is …..………………………………………………………………………. 3. It started to rain an hour ago. → It has ……………………………………………………………………………. 4. They haven’t visited their grandparents for two months. → The last time …………………………………………………………………… 5. We have studied English since we were in grade 3. → We began ………………………………………………………………………. 6. My sister hasn’t seen her best friend for nearly two years. → It’s ……..………………………………………………………………………. 7. When did you start learning English ? → How long ……………………………………………………………………….? 8. We started living here fifteen years ago. → We have ..………………………………………………………………………. 9. The last time she visited me was five years ago. → She hasn’t ………………………………………………………………………. 10. I last wrote to my cousin in February. → I haven’t …………………………………………...……………………………. 11. It’s long time since we became close friend. → We have ………………………………………………………………………. 12. Ba began to collect stamps in 2010. → Ba has ….………………………………………………………………………. III. Complete the sentences with “for” or “since”. 1. It has been raining …………….lunchtime. 2. She has lived in London …………… 1990. 3. I have known her ………………January. 4. His father has worked in this company …………. 20 years. 5. Have you learned English …………..a long time ? 6. I haven’t seen Tom ……………we left school. 7. The roon is very dirty. Nobody has cleaned it …………years. 8. We’ve already waited …………five minutes. IV. Complete the sentences with a suitable word below. for since before never ever 1. I haven’t seen my best friend for many months. 2. Sue has ___________ tried Indian food before. 3. Haven’t you seen Pepper Pig _______ ? 4. Mike has studied English _______ 2015. 5. Has Joe __________ told you his brother’s story? 6. We have known Bob ____________ a long time. 7. Tom hasn’t played football ___________ he broke his leg. 8. I haven’t a film ___________ I moved here.