Tính giả trị biểu thức: 5x2+3x−1 tại a) x=0 b) x=1 c) x=−1

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IV. Complete the sentences with the correct superlative form of the adjectives in the box. difficult beautiful delicious interesting valuable boring polluted amazing 1. Prague is ______________ city I’ve ever seen. 2. What’s _________ book you’ve ever read? - Harry Potter and theSorcerer’s Stone. I really love it! 3. The Grand Canyon is ______________ sight I’ve ever seen. 4. Many climbers consider K2 is ___________ mountain to climb, notMount Everest. 5. That was ______________ movie I’ve ever seen. I almost walked out in the middle. 6. Please give me your recipe. That is ______________ cake I’ve ever eaten. 7. Fresh air doesn’t exist in New Delhi at the moment. It is ___ city on Earth right now. 8. That is ______________ painting in the art gallery. It’s worth a million dollars. V.Complete the sentences with the correct form or tense of the verbs in brackets. 1. My cousin ____________ (be) in Canada two years ago. 2. They ____________ (be) to London many times this year. 3. Tomorrow we ____________ (cycle) around to discover the city. 4. At the moment I ____________ (stay) at a very nice hotel in the south of France. 5. When I was younger, we ____________ (not do) much sport at school. 6. Mrs. Hudson is my maths teacher. She ____________ (teach) for four years. 7. Last year I ___ (go) on a school trip to Scotland. We _____ (have)a very interesting time. 8. Could you meet me at the bus station? My bus ____________ (arrive) at six. 9. My father ___________________ (watch) News in 60 Seconds every evening. 10. ___________________ (you/ ever/ meet) a famous football player? 11. Ten years ago, people ______ (not spend) as much time on screens as they do today 12. Mr Gray ___________________ (teach) French here since 2015. 13. We ___________________ (fly) to Washington tomorrow afternoon. 14. Gustave Eiffel ___________________ (design) Eiffel Tower in 1889. 15. Someone ___________________ (knock) at the door. Can you see who it is? 16. I ___________________ (not play) basketball because I’m not tall enough. giúp mik với