A. There was a rise by 30% in the rate of unemployment.
B. There was a rise of 30% in the rate of unemployment.
C. There was a rise to 30% in the rate of unemployment.
D. There was a rise up 30% in the rate of unemployment.
Đáp án: B
Dịch nghĩa: Tỷ lệ thất nghiệp tăng 30%.
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