Bài Tập IELTS Academic Writing Task 1: Process

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 percent water, 25 percent sand and 50 percent gravel. These 10__________ (to place)  into a concrete mixer, which spins in order to form the concrete.

Answer Keys:

1. be made

2. is used

3. are fed

4. crush

5. is then mixed

6. travelling

7. emerges

8. is then ground

9. is separated

10. are placed

(Nguồn: IELTS Buddy)