I felt vaguely that something was wrong, but what was it? BACK

Đáp án đúng: I felt at the back of my mind that something was wrong, but what was it?

At the back of one’s mind: trong thâm tâm

Dịch nghĩa: Trong thâm tâm tôi cảm thấy có điều gì đó không ổn, nhưng đó là điều gì?