Thomas was not given details of the company's new project. DARK => Thomas was in the dark about the company's new project. Câu này mk lm thế này có chấp nhận đc ko ạ?

Your sentence is almost perfect! The correct sentence would be: "Thomas was in the dark about the company's new project." You were very close, though! The phrase "in the dark" is an idiomatic expression that means to be unaware or uninformed about something. So, in this case, Thomas doesn't have any information about the company's new project. Great job, and keep practicing!