HÃY CHỌN MỘT ĐÁP ÁN ĐÚNG NHẤT (A, B, C HOẶC D) CHO MỖI CÂU SAU

17. I haven’t seen him for months.

A. It’s months since I last saw him B. It’s months when I last saw him

C. It’s months before I last saw him D. It’s months after I last saw him