It's been 15 years since I last watched my favorite Korean film.

49/50

I last watched my favorite Korean film was 15 years.

I haven't watched my favorite Korean film for 15 years.

I didn’t watch my favorite Korean film since 15 years ago.

I have watched my favorite Korean film for 15 years.

Giải thích

Tạm dịch :

Đã 15 năm kể từ lần cuối cùng tôi xem bộ phim Hàn Quốc yêu thích của mình

- It has been + time + since + QkĐ = S + have/ has (not) + V3.

Chọn B