The Amazon rain forest,( )the earth's lungs,converts carbon dioxide in the atmosphere backinto oxyge
考试:=$ecms_gr[fenlei]?>
科目:=$ecms_gr[kemu]?>(在线考试)
问题:
A:functioning as
B:which functioning as
C:functions as
D:functioned as
答案:
解析:
【解析】本句话的主干是 The Amazon rain forest...converts carbon dioxide ...into oxygen,双逗号之间的表达是非限制性定语,对前面的主语The Amazon rain forest做补充说明;具体讲来,非限制性定语从句 which functions as the earth's lungs 可省略为 functioning as...,因此本题答案选 A。
B项中关系代词which应引导非限制性定语从句,其后面的functioning应改为谓语动词的形式functions; C项中functions是动词形式,与后面的谓语动词converts冲突,因为一个句子只能存在一个动词,要么中间须有连接词连接;D项functioned是过去分词,表示被动的语义,这不符合TheAmazon rairi forest 与 function 之间的主动关系。
【点睛】现在分词短语作非限制性后置定语(相当于非限制性定语从句的省略)。
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The Amazon rain forest,( )the earth's lungs,converts carbon dioxide in the atmosphere backinto oxyge
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