(Viên chức Mầm non) 1128 câu trắc nghiệm Tiếng Anh A2 có đáp án - Phần 31

when they (6) ………. in large quantities by teenagers

9/30

when they (6) ………. in large quantities by teenagers

bought

was bought

were bought

have been bought

Giải thích

Chọn C