IELTS Process Diagram Gap Fill

This is an IELTS writing gap fill exercise for process diagrams.

Process diagrams appear less often in the IELTS writing task 1, but they are sometimes there so you need to be prepared if you do get one.

The most important part of it is being able to use the passive.

If you are unsure of how to use the passive voice or how it relates to process diagrams then before you do this gap fill, check out these lessons:

Passive Voice Grammar Lesson

IELTS Process Diagram Lesson

But if you want a quick reminder, these are some basic rules you need to know: 

Quick Passive Overview

1) The passive is used for processes because the focus is on the action, not the person doing it. So the object is made the subject

Active = John takes the dog (object) for a walk every morning.

Passive = The dog (subject) is taken for a walk every morning.

2) An active sentence is also made passive by adding the verb 'to be' and changing the current verb into the past participle

Active = John takes... 

Passive = The dog is (to be) taken (past participle)...

3) Intransitive verbs (verbs that do not take an object) cannot be made passive: 

  • The baby sleeps
  • The dog barks loudly.
  • The staff arrive at 8.30 am. 

IELTS Process Diagram Gap Fill

Now it's your turn to practice.

Some important points before you start:

  • Turn the verb you are given into the passive - if appropriate! (remember intransitive verbs cannot be passive!).
  • Don't forget subject verb agreement.
  • Type in small letters and do not leave a space after the last word (this will make the computer mark it as wrong).
  • If the word '+ then' is included, place 'then' between the verb 'to be' and the past participle:

The water (to heat + then) .......... to 100 degrees. 

The water is then heated to 100 degrees. 

You should spend about 20 minutes on this task.

The diagrams below show the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes.

Summarize the information by selecting and reporting the main features and make comparisons where relevant.

Write at least 150 words.

The diagrams explain the processes of producing cement and concrete. Overall, there are five stages for making the cement and one for the concrete. The cement must (1. to make) first, as it (2. to use) to make the concrete.

To make cement, firstly limestone and clay (3. to feed) into two rollers which (4. to crush) them up into a powder. This power (5. to mix + then) together, before (6. to travel) down a tube and into a rotating heater.

The heat comes up from the bottom as the heater rotates, and once the power is ready, it (7. to emerge) from this machine onto a conveyor belt where it (8. to grind + then) into the cement. Finally it (9. to separate) into bags.

This cement is then used to produce the concrete. To do this, there is a mixture of 15 per cent cement, 10 per cent water, 25 per cent sand and 50 per cent gravel. These (10. to place) into a concrete mixer, which spins in order to form the concrete.

Score =
Correct answers:

Let's just go through some of the answers in case you did not understand them.

  1. (to make) be made - 'must' is a modal verb, so the verb 'to be' is in the infinitive.
  2. (to use) is used
  3. (to feed) are fed - there are 2 subjects so the plural verb is used.
  4. (to crush) crush - the limestone and clay are still the objects ('them'), not the subjects, so it should not be made passive 
  5. (to mix + then) is then mixed.
  6. (to travel) travelling - travel is intransitive, also as it follows 'before', it takes the -ing form.  
  7. (to emerge) emerges - emerge is intransitive.
  8. (to grind + then) is then ground
  9. (to separate) is separated
  10. (to place) are placed - plural verb to agree with 'these'. 


› IELTS Process Gap Fill



New! Comments

Any questions or comments about this page or about IELTS?

Post your comment here.

Writing Task 1 (Academic)

Lesson 1:
Describing a Graph Over Time

Lesson 2:
Describing an IELTS Pie Chart

Lesson 3:
Describing an IELTS Process

Lesson 4:
Describing two graphs together

Lesson 5:
Common Language of Change

Lesson 6:
Gap Fill - Bar Chart

Lesson 7:
Gap Fill - Line Graph

Lesson 8:
Common Language to Compare and Contrast

Lesson 9:
A Common Mistake

Lesson 10:
Describing Tables

Lesson 11:
Organizing your answer

Lesson 12:
Gap Fill - Table

Lesson 13:
Using Prepositions

Lesson 14:
Describing the future

Lesson 15:
Gap Fill - Pie Chart

Lesson 16:
Gap Fill - Process Diagram

Writing Task 1 (GT)

Lesson 1:
Opening and Closing a Letter

Don't worry — your e-mail address is totally secure. I promise to use it only to send you Updates to IELTS buddy.