WHILE MAI _________ THE MEAL, HER BROTHER ________ THE HOUSE.A. COO...

21. - KIEM TRA 1 TIET LOP 11 SO 1
KIEM TRA 1 TIET LOP 11 SO 1

21.While Mai _________ the meal, her brother ________ the house.

A. cooked / clean B. cooked / was cleaning

C. was cooking / cleaned D. was cooking / was cleaning