His parents are poor, but he has tried his best to study well
A. Although his parents are poor, he has tried his best to study well
B. Since his parents are poor, he has tried his best to study well
C. Although he has tried his best to study well, his parents are poor
D. Because his parents are poor, he has tried his best to study well
Đáp án và giải thích tại sao 3 câu còn lại kh đúng ?
A. Although his parents are poor, he has tried his best to study well
B. Since his parents are poor, he has tried his best to study well
C. Although he has tried his best to study well, his parents are poor
D. Because his parents are poor, he has tried his best to study well