The journalist (do) in interview since 15 minutes ago
Jawaban Terkonfirmasi
The journalist has been doing the interview since 15 minutes ago
(pekerjaan yang sudah dan masih berlangsung smpai waktu yang d tentukan)
ato the journalist has done the interview since 15 minutes ago
(pekerjaan yg sudah d mulai sejak 15 minutes yg lalu)
The answer is "did"……