“What were you doing last night, Mr John?” a...

Câu hỏi: “What were you doing last night, Mr John?” asked the police

A. The police asked what were you doing last night, Mr John

B. The police asked Mr John what he had been doing the night before

C. The police asked Mr John what he had been done the night beforev

D. The police asked Mr John what had he been done the night before