Use of English

Level C1

Part 1 - Multiple Choice

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For Questions 1-8, read the text below and decide which answer best fits each gap.

Forest Diversity

Biodiversity is often discussed in terms of the number of species in a given habitat, but ecologists argue that this is only one part of the picture. A forest may appear rich in life and yet be highly vulnerable if key relationships between organisms are not properly understood. For instance, when a dominant species is removed, the effects may (0) RIPPLE through the entire system. What seems at first to be a minor change can (1) .......... into a major ecological imbalance. Researchers therefore try to measure not only species richness but also the extent to which different organisms depend (2) .......... one another. Pollinators, fungi and soil bacteria all play roles that are easy to overlook, yet they are essential to nutrient cycling and plant regeneration. If one component declines, the ecosystem may lose its capacity to recover from disturbance. In this sense, resilience is not simply a matter of size, but of how well the system can (3) .......... shocks. Conservationists also warn against focusing exclusively on charismatic animals. Protecting an ecosystem requires a broader (4) .......... that includes genetic variation, habitat connectivity and long-term stability. Unless policies are based on solid evidence, efforts to restore damaged environments may (5) .......... short of their goals. This is why scientists place great emphasis on field data, careful monitoring and the need to (6) .......... between natural fluctuation and human-induced decline. Only then can effective strategies be (7) .......... into practice and vulnerable habitats be protected for future generations. In short, ecology depends as much on understanding complex interactions as on counting the species that (8) .......... them.

What to do

In this part, you read a text with eight gaps and choose the best word from four options to fit each gap.

Nothing prepares you for this test better than reading.

Read a lot. Candidates who often read in English (for work, for fun) find this part of the test manageable, while those who never read tend to find it very hard.

If you are 100% sure that two of the 4 choices are completely identical, then neither can be the answer. There is always only one word that fits grammatically and has the right meaning.

Usually the correct option will be part of a fixed phrase or collocation, a phrasal verb, a connector or the only word that fits grammatically in the gap.

Strategy

  1. Read the title and the whole text quickly to understand its general meaning before you attempt the task.
  2. Check the words before and after the gap.
  3. Choose the best option.
  4. When you have finished, read the text again with the words inserted to check that it makes sense.

Instructions

For Questions 1-8, read the text below and decide which answer best fits each gap.

Exercise Details

Author

Joanna Sledzik

@joanna-sledzik

User Prompt

"Create a task about biodiversity and ecology using scientific vocabulary and specific collocations."

Tone: Standard
Level: C1

Created on:

Jun 28, 2026

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