How Hydroxyapatite Toothpaste Compares With Fluoride for Oral Health

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 “conventional” as used in the article?

   1. Following established customs, methods, or standards rather than being novel or alternative
   2. Designed exclusively for young children
   3. Containing a naturally occurring mineral
   4. Supported only by informal online opinions
   Check answers and explanations

   Answer

   Following established customs, methods, or standards rather than being novel or alternative

   Here, conventional contrasts with an alternative product.

2. Question 2 · Single choice

   Choose one answer.

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

   1. Afterward or later, especially as a consequence of an earlier event
   2. In a manner that happens simultaneously
   3. Before an event has taken place
   4. Without any connection to previous developments
   Check answers and explanations

   Answer

   Afterward or later, especially as a consequence of an earlier event

   The word indicates that wider availability followed earlier popularity.

3. Question 3 · Single choice

   Choose one answer.

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

   1. Intended to guard against harm, damage, or an undesirable effect
   2. Likely to attract attention through fashionable design
   3. Concerned exclusively with taste or appearance
   4. Produced without any mineral ingredients
   Check answers and explanations

   Answer

   Intended to guard against harm, damage, or an undesirable effect

   The adjective describes an effect that guards teeth against harm.

4. Question 4 · Single choice

   Choose one answer.

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

   1. recognized or understood in a particular way, whether or not that understanding is fully objective
   2. Measured under identical laboratory conditions
   3. Officially required by international regulations
   4. Proven through decades of universal clinical use
   Check answers and explanations

   Answer

   recognized or understood in a particular way, whether or not that understanding is fully objective

   The term concerns advantages understood in a particular way.

5. Question 5 · Single choice

   Choose one answer.

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

   1. Showing or proving something through evidence or reasoning
   2. Promoting something through repeated advertising
   3. Replacing one substance with another automatically
   4. Describing a concern without examining it
   Check answers and explanations

   Answer

   Showing or proving something through evidence or reasoning

   The term refers to proving a claim through evidence or reasoning.

6. Question 6 · Single choice

   Choose one answer.

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

   1. The particular arrangement or makeup of the parts of something
   2. The historical spread of a product across countries
   3. The public visibility created by online personalities
   4. The protective effect of a mineral on enamel
   Check answers and explanations

   Answer

   The particular arrangement or makeup of the parts of something

   It refers to what the gut microbiome is made up of.

7. Question 7 · Single choice

   Choose one answer.

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

   1. popular or socially attractive at a particular time, often because it is associated with current trends
   2. Established through extensive clinical evidence
   3. Required for preventing bacteria from forming
   4. Limited to products intended for dental professionals
   Check answers and explanations

   Answer

   popular or socially attractive at a particular time, often because it is associated with current trends

   The word refers to popularity associated with current trends.

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.