【題目】It is estimated that hopefully about 0. 5 billion families_______5G terminals by 2025, when there is a sharp drop in price.

A.have usedB.will have used

C.will be usingD.are using

【答案】B

【解析】

考查時(shí)態(tài)。句意:據(jù)估計(jì),到2025年,5G終端的價(jià)格將大幅下降,屆時(shí)有望有約5億家庭使用該終端。根據(jù)時(shí)間狀語(yǔ)by 2025,可知用將來(lái)時(shí)態(tài),這里表示在將來(lái)某一時(shí)間以前已經(jīng)完成,所以用將來(lái)完成時(shí)態(tài)。故選B

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