【題目】5G smart phones are believed to work 9 and 20 times faster than previous______________.

A.onesB.thoseC.themD.that

【答案】A

【解析】

考查代詞詞義辨析。句意：據(jù)認為，5G智能手機的運行速度比之前的手機快了9到20倍。A. ones泛指前面的可數(shù)名詞復數(shù)；B. those那些，特指前面提到的可數(shù)名詞復數(shù)；C. them他們，指代前面的可數(shù)名詞復數(shù)；D. that特指前面提到的單數(shù)名詞或者不可數(shù)名詞。根據(jù)語境可知，此處泛指以前的smart phones，應使用ones。故選A。

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