题目：
选择题
在1977年，中国进出口总额还不到150亿美元，仅占世界贸易总额的0.6%。_________
- A. In 1977, the sum total of Chinese imports and exports was less than $15 billion, putting China’s share of world trade at 0.6 percent.
- B. In 1977, the total sum of Chinese imports and exports was less than $15 billion, put China’s share of world trade at 0.6 percent.
- C. In 1977, the sum total of Chinese imports and exports was less than $150 billion, putting China’s share of world trade at 0.6 percent.
- D. In 1977, the total sum of Chinese imports and exports was less than $150 billion, putting China’s share of world trade at 0.6 percent.
答案：
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