【題目】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】

考查動(dòng)詞時(shí)態(tài)辨析。句意:中國(guó)的母嬰用品電子商務(wù)平臺(tái)正在加大投資并加快它們擴(kuò)大線下渠道的步伐。注意空格后面的speeding up，由并列連詞連接的平行謂語應(yīng)保持一致，根據(jù)主語的內(nèi)容…platforms為復(fù)數(shù)含義，所以空格處應(yīng)該填的是are doing。選項(xiàng)B符合題意。故選B。

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