Name three C1 grammar structures.

great happiness or pleasure

The ability to speak or write a language easily, well, and quickly.

To improve the quality or usefulness of something, or change it for something newer or of a better standard.

not willing to do something (adj.)

A group of words in a fixed order that has a particular meaning that is different from the meanings of each word on its own.

It is an online presentation-building tool that facilitates audience engagement. The tool allows presenters to include polls, multiple-choice and open-ended questions, quizzes, and scales that audience members can interact with live.