There is a mistake in this course with the idiom “To burn the candle at both ends”. Unfortunately the course says it means “To waste material wealth”, but it actually has a nuance more along the lines of to overwork yourself in an unsustainable way.
Some links to back this up:
- https://dictionary.cambridge.org/dictionary/english/burn-the-candle-at-both-ends
- https://www.collinsdictionary.com/dictionary/english/burn-the-candle-at-both-ends
There are many other links, but apparently as a new user I am limited to two links.