. After crude oil, natural gas is the United States second biggest fuel source and supplied almost exclusively from reserves in North America.
(A) After crude oil, natural gas is the United States second biggest fuel source and supplied almost exclusively from reserves in North America.
(B) Natural gas, after crude oil the United States second biggest fuel source, supplied almost exclusively from reserves in North America.
(C) Being supplied almost exclusively from reserves in North America, natural gas, the United States second biggest fuel source after crude oil.
(D) Natural gas, the United States’ second biggest fuel source after crude oil, is supplied almost exclusively from reserves in North America. (E) Natural gas is supplied almost exclusively from reserves in North America, being the United States’ second biggest fuel source after crude oil. 正确答案是D。对于选项A的有一点解答我不是太明白。A一是and前后不对称,这很明显。但解释还说after crude oil 位置不好,这点我不大明白。希望牛牛解答~~谢谢