`bb(Answer) ` . ` A ` . This factory wasn't built during the Second World War by the German

` - ` Câu bị động thì quá khứ đơn : S + was / were + ( not ) + V3 + ( by O ) 

` - ` Build ` -> ` Built ( V2 ) ` -> ` Built ( V3 ) , vậy loại đáp án ` B ` 

` - ` This Factory : Nhà máy này ` - ` Danh từ số ít ` -> ` Dùng be là was ( not ) , vậy loại đáp án `C , D ` 

The German didn't build this factory during the Second World War
A. This factory wasn't built during the Second World War by the German
B. This factory wasn't build during the Second World War by the German (dùng sai Vpii)
C. This factory weren't built during the Second World War by the German (dùng sai tobe, this factory là số ít phải dùng was)
D. This factory were built during the Second World War by the German (lỗi sai tương tự câu C)

→ Chọn A (đúng form của passive voice và dùng đúng tobe, Vpii)

Chúc bn hc tốt nka^^