Today a large coal-fired power plant can give out in a single year as much poisonous gas as was blown out by the May 18,1980 outbreak of Mount St. Helens, some. 400,000 ton.
A. its amount was
B. amounts to
C. amounting to
D. it was amounted
网友回答
A. its amount was
B. amounts to
(答案→)C. amounting to
D. it was amounted
解析：可联系客服索取此答案。