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Câu hỏi và đáp án bài nghe Test 3 section 4 - IELTS Cambridge 12 - The effects of environmental change on birds

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Questions 31-40​

Complete the notes below.

Write ONE WORD ONLY for each answer.

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The effects of environmental change on birds

Mercury (Hg)

  • Highly toxic
  • Released into the atmosphere from coal
  • In water it may be consumed by fish
  • It has also recently been found to affect birds which feed on 31 ..................

Research on effects of mercury on birds

  • Claire Varian-Ramos is investigating:

    • the effects on birds' 32 .................. or mental processes, e.g. memory
    • the effects on bird song (usually learned from a bird's 33 .................. )

  • Findings:

    • songs learned by birds exposed to mercury are less 34 ..................
    • this may have a negative effect on birds' 35 ..................

  • Lab-based studies:

    • allow more 36 .................. for the experimenter

Implications for humans

  • Migrating birds such as 37 .................. containing mercury may be eaten by humans
  • Mercury also causes problems in learning 38 ..................
  • Mercury in a mother's body from 39 .................. may affect the unborn child
  • New regulations for mercury emissions will affect everyone's energy 40 ..................

Đáp án​

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Section 4, Questions 31-40​

  1. insects
  2. behaviour/behavior
  3. father
  4. complex/complicated
  5. reproduction/breeding
  6. control
  7. duck(s)
  8. language
  9. food
  10. cost(s)/price(s)/bill(s)