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    【题目】China’s maternal and infant goods ecommerce platforms ________ heavily and speeding up their steps to expand offline channels.

    A.investB.are investingC.are investedD.have invested

    【答案】B

    【解析】

    考查动词时态辨析。句意:中国的母婴用品电子商务平台正在加大投资并加快它们扩大线下渠道的步伐。注意空格后面的speeding up，由并列连词连接的平行谓语应保持一致，根据主语的内容…platforms为复数含义，所以空格处应该填的是are doing。选项B符合题意。故选B。

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