Choose the best answer: 

_____is a question scientists have yet to answer.

Câu hỏi liên quan

• Choose the best answer: 

  Two-thirds of the money______ mine now.

• Choose the best answer: 

  They gave us a lot of information, most of ____ was useless.

• Choose the best answer: 

  I wish the rain_____ soon.

ZUNIA12

• Choose the best answer: 

  The year____ we came to live here was 1975.

• Choose the letter A, B, C or D to complete the sentence: What is the longest river __________ the world?

• Choose correct answer A, B, C or D to complete the sentence. He made me _____________they had left the district

• Choose the best answer: 

  Each of the reference _____ available in the school library.

• Choose the best answer: 

  The year____ he died was full of calamities.

• Choose the best answer: 

  Mathematics_____ difficult.

• Choose the letter A, B, C or D to complete the sentences:

  _______ movie would you prefer to see – “Romeo and Juliet” or “Titanic”?

• Choose the best answer: 

  _____ did he feel! Very nervous.

• I think Son Doong Cave is by far ____________ cave in Vietnam

• Choose the best answer: 

  May you_____ happy all your life!

• Choose the best answer: 

  The teacher affirmed that these students _____ the exam.

• Choose the best answer: 

  The land and the people______ I have met are nice.

• Choose the best answer: 

  It is in this room_____ we usually hold our meetings.

• Choose the letter A, B, C or D to complete the sentences:
  Scientists believe that this pyramid was built ___________ a period of 10 to 20 years.

• Choose the best answer: 

  “I had a hard time taking notes on the lecture”

            “I did too. The professor speaks_____”.

• Choose the best answer: 

  “The postal strike started today”

            “_____something to prevent it?”

• Choose correct answer A, B, C or D to complete the sentence.  I think Son Doong Cave is by far ____________ cave in Vietnam