A là kí hiệu của khối khí

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose one sentence that has the same meaning to the root one:

  Tom regrets selling his house.
  
  

• Choose one sentence that has the same meaning to the root one:

  "Can you do me a favour? "
  
  

• Choose the word that has the underlined part pronounced differently from the rest:  

  found                    count                      bound                        cousin

• Choose the word that has the underlined part pronounced differently from the rest:  

  language                  any                  fancy                   romance

• Choose a word that has different stress pattern:

  History                      English                   Mathematics                       Physics

• Choose a word that has different stress pattern:

  biology                chemistry                     geography                       technology

• Choose a word that has different stress pattern:

  children                      enjoy                        above                       create

• Find a mistake in the four underlined parts of the sentence and correct it:

  We have to cancel the meeting because the chairman's absence.

• Find a mistake in the four underlined parts of the sentence and correct it:

  It's time you begin to study seriously.

• Choose one sentence that has the same meaning to the root one:

  Picking flowers is not permitted here.