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