Many people had been homeless before they were rescued by the volunteers.
A.After they were rescued by the volunteers, many people had been homeless.
B.After they had been rescued by the volunteers, many people were homeless.
C.After they had been rescued by the volunteers, many people weren’t homeless.
D.After they were rescued by the volunteers, many people hadn’t been homeless.
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Cấu trúc của After: After S + V ( QKHT ), S + V ( QKĐ )
⇒ Chọn đáp án C
C.After they had been rescued by the volunteers, many people weren’t homeless.