I WAS COOKING DINNER ...THE PHONE ...A. THEN/ RANG B. THEN/ WAS RIN...

9. - DE KIEM TRA 45 PHUT HK 2
DE KIEM TRA 45 PHUT HK 2
9. I was cooking dinner ...the phone ...A. then/ rang B. then/ was ringing C. when/ rang D.when/ was ringing