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• Thực hành thí nghiệm : nhỏ từng giọt dung dịch KMnO₄ loãng vào ống nghiệm đựng dung dịch hỗn hợp FeSO₄ và H₂SO₄ loãng, lắc nhẹ. Nêu hiện tượng xảy ra, viết và cân bằng phương trình hóa học để giải thích và cho biết vai trò của từng chất, trong phản ứng.  

• Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions:   

  Eugenie Clark has a wide __________ about cultures of many countries in the world  

• Mark the letter A, Β, C or D to indicate the correct answer to each of the following questions:

  It was a joke! I was pulling your _______.         

• Mark the letter A, Β, C or D to indicate the correct answer to each of the following questions:

  It was so foggy that the driver couldn't _______ the traffic signs.  

• Mark the letter A, Β, C or D to indicate the correct answer to each of the following questions:

  She made the _______ mistake of forgetting to put the s” on the verb in the third person singular.         

• Mark the letter A, Β, C or D to indicate the correct answer to each of the following questions:

  The teacher hoped to _______ a positive, not a negative reply from his student.         

• Mark the letter A, Β, C or D to indicate the correct answer to each of the following questions:

  Mrs. Marie told her little boy to put all his toys _______ before coming to dinner.  

• Mark the letter A, Β, C or D to indicate the correct answer to each of the following questions:

  I had a long _______ with my neighbor yesterday. We talked for hours.         

• Mark the letter A, Β, C or D to indicate the correct answer to each of the following questions:

  The old astronomer patiently made his _______ and wrote down what he saw.         

• Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions:

  It is vital to create a good impression ______ your interviewer.