THEY …….. THEIR HOMEWORK AT THE MOMENT. A. IS DOING B. HAS DONE C....

16. - DE KIEM TRA ANH VAN 45 PHUT LOP 10
DE KIEM TRA ANH VAN 45 PHUT LOP 10

16. They …….. their homework at the moment.

A. is doing B. has done C. are doing D. did