Choose the best answer:
Paleontologists have come to no definite conclusions as to ______ there have been periodic mass extinctions throughout pre-history.

Câu hỏi liên quan

• Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.

  Câu 50. Boys and girls can't be real friends. Tara's grandmother thinks so.

• If you had studied hard, you  ...............  your final exams.

• George decided to take a year ______ work to live in different countries in Europe 

ZUNIA12

• He sees men, women, cat, dogs and cars__________ move mound and round.

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

  74. When you use the Internet, you have so much information at your____________.

   

• Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.

  Câu 45. Governments should take measures to protect wildlife, or more and more animals will become endangered.

• Don't put off doing your homework until tomorrow. Do it right now, .......... ?

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

  Câu 7. The existence of such a centre is expected to help ASEAN members facilitate assistance to any country ____ by a disaster.

• Only one of the people _________ work in the company is qualified.

• A _____family consists of parents and their children.

   

• Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

  Câu 19. After months lying in bed because of a serious disease, now she looks so shabby, which is really different from her being animate before.

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

  Câu 10. James didn’t take ___________ to your suggestion that she was mean with money.

• Elephants break up thorny bushes to create grasslands for other animals to inhabit.

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

  Câu 16. My mother told me to give him a sniff of smelling _________ to bring him around.

• English     _____________         in many parts of the world.

• Choose the answer (A, B, C or D) that best completes each of the following sentences.

  ______speaking, I do not really like my present job.

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

  Câu 5. Two young men were arrested on suspicion of setting fire ____________a police van.

• My aunt's going through a  ___divorce; she‘s paying a fortune in legal fees.

• Underwood Energy Services Inc. offers ............... benefits to full-time employees,including dental insurance.

• The computer lab will undergo ................ renovations to meet the needs of our school's growing student body.