The boss came into the office when we were laughin...

Câu hỏi: The boss came into the office when we were laughing and wanted to know what was..............on.

A going

B keeping

C getting

D putting

Câu hỏi trên thuộc đề trắc nghiệm

Thi online_Unit 9. Working and Earning_Có lời giải chi tiết