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Study the questions and tasks

Work through the material below, or start the interactive practice above to complete an attempt. Try the exercises before opening any answer or transcript sections, then use them to review your work.

Practice level

C1. Try this level if you can follow the instructions and understand most of the language; choose an earlier level if you need more support.

Question formats

Single choice

How to approach this practice

Use the surrounding sentence to identify the meaning and word form needed. Check which words naturally go together.

1. Question 1 · Single choice

   Choose one answer.

   Which option best defines “fundamental” as used in the article?

   1. Peripheral and easily overlooked
   2. forming the essential basis of something; central to its nature or understanding
   3. Recently discovered through experimentation
   4. Difficult solely because it is technical
   Check answers and explanations

   Answer

   forming the essential basis of something; central to its nature or understanding

   The word describes a question central to cosmological understanding.

2. Question 2 · Single choice

   Choose one answer.

   Which option best defines “profound” as used in the article?

   1. extremely significant, deep, or intellectually demanding
   2. Briefly noticeable but unimportant
   3. Precisely measurable with ordinary instruments
   4. Widely accepted without further discussion
   Check answers and explanations

   Answer

   extremely significant, deep, or intellectually demanding

   Here, it describes an exceptionally deep and significant imbalance.

3. Question 3 · Single choice

   Choose one answer.

   Which option best defines “converted” as used in the article?

   1. Separated into smaller particles
   2. changed from one form, substance, or state into another
   3. Observed without affecting surrounding matter
   4. Explained through historical comparison
   Check answers and explanations

   Answer

   changed from one form, substance, or state into another

   Matter and antimatter change into another form: energy.

4. Question 4 · Single choice

   Choose one answer.

   Which option best defines “requires” as used in the article?

   1. Strongly suggests but does not need
   2. Needs something as necessary or essential
   3. Contradicts an explanation already provided
   4. Describes something that happened accidentally
   Check answers and explanations

   Answer

   Needs something as necessary or essential

   The universe’s composition is presented as needing an explanation.

5. Question 5 · Single choice

   Choose one answer.

   Which option best defines “extremely” as used in the article?

   1. To a very high or exceptional degree
   2. In a potentially inaccurate manner
   3. At a moderately elevated level
   4. According to a purely theoretical estimate
   Check answers and explanations

   Answer

   To a very high or exceptional degree

   It intensifies the description of the early universe’s temperature.

6. Question 6 · Single choice

   Choose one answer.

   Which option best defines “refined” as used in the article?

   1. Abandoned after initial testing
   2. improved an explanation or method by making it more precise or effective
   3. Repeated without modification
   4. Translated into nontechnical language
   Check answers and explanations

   Answer

   improved an explanation or method by making it more precise or effective

   Theories are improved by making their explanations more accurate.

7. Question 7 · Single choice

   Choose one answer.

   Which option best defines “reconstruction” as used in the article?

   1. A prediction about an unknown future event
   2. the process of forming an account of something past from available evidence
   3. A physical expansion caused by antimatter
   4. A classification of living organisms
   Check answers and explanations

   Answer

   the process of forming an account of something past from available evidence

   Cosmology reconstructs the past using available scientific evidence.

What to review next

Keep a short list of unfamiliar words with their meanings and example sentences. Practise recalling them later, then use them in a sentence of your own.

A focused practice result shows how you did on these tasks. Use several activities across skills to decide what to study next; one practice score does not certify an overall CEFR level.

Before you practise: a worked example

Read the whole sentence before choosing a word. Check both its meaning and the words it naturally combines with.

Please make an appointment before visiting the clinic.

Make an appointment is a natural word combination. Knowing a dictionary meaning alone may not tell you which verb fits.

This teaching example is separate from the scored questions. After your test, compare any mistakes with the explanation and revisit the topic before trying again.