Part 1: Choose the word or phrase that best completes each sentence:

1. The use of ____ materials can have a significant impact on environmental sustainability.

A. artificial B. natural C. false D. physical

2. It’s irresponsible to have ____ data when making important decisions.

A. false B. accurate C. average D. narrow

3. Scientists often develop a new ____ to address complex problems in their fields.

A. way B. aim C. method D. reason

4. A ____ is a device that converts electrical energy into mechanical energy.

A. motor B. research C. experiment D. conclusion

5. When the machine suddenly ____ , we had to troubleshoot the issue.

A. came off B. broke down C. cut off D. turned off

6. The researchers aimed to ____ the cause of the unusual phenomenon.

A. find out B. come up with C. carry out D. put through

7. To get accurate results, scientists must ____ their experiments carefully.

A. perform B. attempt C. aim D. give off

8. During the experiment, they discovered that certain chemicals could ____ heat.

A. break down B. give off C. come on D. turn off

9. The team had to ____ the list of potential solutions to find the best one.

A. narrow down B. turn into C. come to D. carry out

10. In their ____ , the researchers highlighted the importance of renewable energy.

A. conclusion B. End C. attempt D. cause

11. We often make estimates based on the ____ data available to us.

A. average B. false C. experimental D. modern

12. The ability to ____ a new product often leads to industry innovation.

A. invent B. calculate C. estimate D. research

13. After the conference, I received a ____ from a colleague discussing our next steps.

A. phone call B. photo C. conclusion D. experiment

14. The research team plans to ____ an experiment on climate change next month.

A. perform B. attempt C. find out D. cut off

15. She managed to ____ an effective marketing strategy for the new product.

A. come off B. come up with C. turn into D. break down

16. The factory’s new machine is designed to ____ more efficiently than older models.

A. work out B. plug in C. develop D. turn off

17. To better understand the issue, we must ____ the relevant facts.

A. face B. put through C. cut off D. turn off

18. The introduction of advanced technology in agriculture has led to significant ____.

A. conclusions B. development C. experiments D. attempts

19. Many people underestimate the ____ of their decisions on their overall success.

A. reason B. aim C. cause D. conclusion

20. The device needs to be ____ to the power source before use.

A. turned off B. plugged in C. broken down D. narrowed down