Chọn phương án (A, B, C hoặc D) có nghĩa gần nhất với câu cho trước.
I don’t understand you.You speak very quickly
A.If you didn’t speak very quickly, I could understand you
B.If you don’t speak very quickly, I could understand you
C.If you speak  quickly, I can understand you
D.If you didn’t speak very quickly, I will understand you

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