David _____________ (repair) the TV set at the moment. He _____________ (work) at it for one hour or so.Đoạn văn72/101David _____________ (repair) the TV set at the moment. He _____________ (work) at it for one hour or so.Nhập câu trả lời ở đâyXác nhậnGiải thíchis repairing - has been working