Question

He identified the most important machines required/ for modern life and worked on making a prototype/'do it yourself' version of each because he believed that if people/could build these themselves, it would improve their way of life.

• A. He identified the most important machines required
• B. For modem life and worked in making a prototype
• C. 'Do it yourself version of each because he believed that if people
• D. Could build these themselves, it would improve their way of life
• E. No error
  

Answer 1

The correct option is B For modem life and worked in making a prototype

Remove 'for' by 'in' to make the syntax correct.
e.g. The skills that are required in teaching profession are one's confidence and presentation.