by I/ satisfied/ the service/ Thanh Ba Post Office
A. I was satisfied with the service of Thanh Ba Post Office
B. So that, I was satisfied with the service of Thanh Ba Post Office
C. Nevertheless, I was satisfied with the service of Thanh Ba Post Office
D. I was satisfied with the service of which Thanh Ba Post Office
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Đáp án: A
Giải thích: Tôi hài lòng với dịch vụ của Bưu điện Thanh Ba.
