The brain drain of experts away from developing countries will greatly influence

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问题 The brain drain of experts away from developing countries will greatly influence these countries’ development of______industry.

选项 A、complicated
B、sophisticated
C、primitive
D、collective

答案 B

解析各项的意思是：complicated复杂的，难懂的。sophisticated精密的，尖端的；老练的，老于世故的。primitive原始的，粗糙的。collective集体的，共同的。根据句意判断，答案为B。

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