HE HAS BEEN SELLING MOTORCYCLES………A-TEN YEARS AGO B-SINCE TEN YEARS...

2- - BAI TAP TRAC NGHIEM VE THI TRONG TIENG ANH
BAI TAP TRAC NGHIEM VE THI TRONG TIENG ANH
2-He has been selling motorcycles………A-ten years ago B-since ten years C-for ten years ago D-for ten years