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        1. 【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(xiàng)令人興奮的移動(dòng)通訊技術(shù),它將極大地推動(dòng)智能城市和汽車的發(fā)展。5G作為先行詞是一個(gè)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(guān)系代詞which。故此題選D。

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