** Một người khởi hành đi từ A đến B cách nhau 50 (km) trong 1 giờ. Nghỉ tại B 1 giờ và đi trở về A trong 30 phút.

Tốc độ trung bình cùa người đó trong suốt đường đi và về là

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  address                       important                      master                       embarrass

• Choose a word that has different stress pattern:

  service                    lobby                        weather                     receive

• Choose a word that has different stress pattern:

  polite                      problem                       arrive                       guitar

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

  I enjoy to talk with my classmates about their future plans.

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

  My daughter has been absent from school for three days because her illness.

• Choose the best answer for the following sentence:

  My brother’s new hobby is ______________ foreign coins.
  
  

• Choose the best answer for the following sentence:

  The children agreed _____________ the candy equally.
  
  

• Choose the best answer for the following sentence:

  Bob _____________ eating a whole bag of chocolate chip cookies before lunch.
  
  

• Choose the best answer for the following sentence:

  Mai is interested ____________ taking an art course.
  
  

• Choose the best answer for the following sentence:

  The Internet is an important ____________ of communication in modern world.