The sophistication of the industrial structure needs the support of advanced technology.
A、building
B、upgrade
C、completion
D、reform
【正确答案】：B
【题目解析】："sophistication"意为“复杂”，building建筑物；upgrade升级，增加；completion完成，结束；reform改革；B项更符合题意，故选B。
The sophistication of the industrial structure needs the support
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