This is a C2 Proficiency practice exam for Part 4: Key Word Transformation. The summary below keeps the exercise understandable, linkable, and accessible outside the interactive runner.
Don't let Sarah's carefree attitude deceive you; she's an extremely conscientious worker.
[taken]
Don't let _______ Sarah's carefree attitude; she's an extremely conscientious worker.
Fred didn't tell Sophie his news until she had finished her homework.
[for]
Fred _______ telling her his news.
Although I am angry about what happened, in no circumstances would I want anyone to intervene on my behalf.
[last]
Although I am angry about what happened, the _______ anyone to intervene on my behalf.
There is a rumour that the company lost over $20 million during the price war.
[sustained]
The company is rumoured _______ over $20 million during the price war.
I ought to have had the roof repaired in the summer rather than leaving it until the autumn.
[better]
It _______ had the roof repaired in the summer rather than leaving it until the autumn.
Alex made regular calls to his parents while travelling abroad.
[kept]
Alex _______ his parents by phone while travelling abroad.