Câu hỏi:
The secrecy of the police operation against the gang was complete. It seems only in jail did its bosses discover their phone calls……………listened to for months.
- A were being
- B had been
- C were
- D have-been
Phương pháp giải:
Lời giải chi tiết:
Quảng cáo
Câu hỏi trước
