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It was in__ when he was already in ___ that he went to Yan'an.
A. the 1940s, the 40s
B. the 1940s, his forties
C. 1940's, his forties
D. the 1940's, his 40s
1708 读作 seventeen o eight 正确吗？
A. 对
B. 错
2013 读作 two thousand thirteen 正确吗？
A. 对
B. 错
2000年读作two zero zero zero 正确吗？
A. 对
B. 错
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