500 Câu trắc nghiệm tổng hợp ngữ pháp Tiếng Anh thi THPT Quốc gia (Phần 13)

“The Wall” ….. when all the members were students

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“The Wall” ….. when all the members were students.

founded

was founded

has been founded

have been founded

Giải thích

Chọn B