Definition: when you use physical or mental effort to do something Level: B1
写一篇长文章是项艰苦的工作。
Writing a long essay is hard ___work.
组织这次活动将需要大量的工作。
Organising the event will be a lot of ___work.
跟上高级班的进度是件费劲的事。
Keeping up with the advanced class is hard ___work.
