____________ China has made advances in ...

____________ China has made advances in 5G technology, there is still a long way to go for its popularity.

A.If B.Because C.Since D.While

D 【解析】考查连词词义辨析。句意：尽管中国在5G技术方面取得了进步，但要让它普及还有很长一段路要走。A. If如果；B. Because因为；C. Since自从，因为；D. While尽管。根据句意可知，此处用while“尽管”引导让步状语从句符合语境，故选D项。

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