The government has spent billions to upgrade its infrastructure to handle the high-speed wireless connections.

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问题 The government has spent billions to upgrade its infrastructure to handle the high-speed wireless connections.

选项 A、reproach
B、improve
C、fortify
D、uproot

答案B

解析句意：政府已经花费数十亿改善基础设施，以应对高速无线网络。upgrade(提高，改善)；improve(提高)；reproach(责备)；。fortify(使坚强，增强)；uproot(根除)。所以选项B为答案。

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