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【題目】5G is an exciting mobile technology, ________ will give a massive boost to smart cities and vehicles.

A.whereB.whenC.thatD.which

【答案】D

【解析】

考查定語從句。句意:5G是一項令人興奮的移動通訊技術,它將極大地推動智能城市和汽車的發(fā)展。5G作為先行詞是一個事物,定語從句中又缺主語并且前還有逗號,所以不能用that,只能用關系代詞which。故此題選D。

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