单选题
Carmakers challenged the law, in part______C02, was not an air pollutant.
A、
on the ground
B、
on ground
C、
on the ground that
D、
on ground that
【正确答案】
C
【答案解析】
解析:句意:汽车制造商对法律提出了质疑,部分根据是二氧化碳不属于空气污染物。inpart on the ground that部分根据是…。on the ground在地上;当场。on ground在地面。on ground that以…为理由;根据。
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