【題目】By not having a child, the carbon footprint of an individual ________ in a developed country would be reduced on average by an extra 58.6 tons of carbon dioxide every year, ________ current emission rates.

A. lived; basing on B. living; basing on

C. lived; based on D. living; based on

【答案】D

【解析】考查非謂語動詞。句意:按照現(xiàn)在的排放速率,每少生一個孩子,發(fā)達(dá)國家每年的個人碳排放量將平均額外減少58.6噸。第一個空是作定語,修飾an individual,“一個人主動生活”,故用v-ing形式;第二個空表示“以……為根據(jù)”,base A onbe based on,本空是作an extra 58.6 tons of carbon dioxide 的后置定語,base與前面提到的數(shù)據(jù)是被動關(guān)系,故用過去分詞。綜合以上,故選D

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