HÃY CHỌN MỘT CÂU TRẢ LỜI ĐÚNG NHẤT

13. - ON THI TRAC NGHIEM TIENG ANH 12BAM SAT
ON THI TRAC NGHIEM TIENG ANH 12BAM SAT

13. If I_______ so busy yesterday, I would have visited you.

A. were not B. wasn’t C. aren’t D. hadn’t been