TOM BURNT HIS HAND WHEN HE ……… THE DINNER.A. COOKED B. HAS COOKED...

28. - DE KIEM TRA LOP 8 HK II BAI 2
DE KIEM TRA LOP 8 HK II BAI 2

28. Tom burnt his hand when he

………

the dinner.

A. cooked B. has cooked C. was cooking D. cooks