Choose the best answer:
 ___________ occurs when the atmosphere contains gases, dust, or fumes in.

Câu hỏi liên quan

• We are ...... no obligation to change goods which were not purchased here.

• There are several reasons why we should protect endangered species.

• There are six letters ... today.

ZUNIA12

• Choose the best answer.

  The man who is standing there is a clown. => The man __________.

• Karl Marx is the German philosopher…............ principles have changed word‟s history.

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

  Câu 12. Don't put the laptop away – I __________ using it yet.

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

  Liam helped Susan a lot with her task. She couldn't continue without him.

• The______ is the air, water and land in or on which people, animals and plants live.

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

  Câu 13. Now that she is trained, she hopes to earn her living as a ________ in an office.

• Choose the best answer:
  I agree with you …………….. some extent.

• ................ we have!

• Find out the synonym of the underlined word from the options below

  Before the interview, you have to send a letter of application and your résumé to the company.

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

  A _______ is an official document that you receive when you have completed a course of study or training.

• Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions.

  Câu 28. I have never had much of a/an ability for languages, unfortunately.

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

  Câu 21. The schoolboy’s excuse wasn’t credible at all. Nobody in the classroom believed in the far-fetched story he told.

• 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. Dark clouds began to spread out across the sky, so we rushed to the house as fast as possible.

• The document .............. copied has already been taken to the office by Ms. McCluskey.

• ............. anything suspicious arise, please let me know at once.

• The woman thanked the doctor ......... treatment had cured her.

• It is ................. that we fix this problem before we move on to the next one.