Question

【题目】________ three fourths of the Earth's surface is covered with water, 97 percent of it is salt water in the sea.

A.ButB.AlthoughC.AsD.However

Answer 1

【答案】B

【解析】

句意：虽然地球表面的四分之三被水覆盖，但其中97%是海水。

考查连词辨析。But但是；Although虽然，尽管；As因为，随着；However但是（其后需要加，）。分析句子可知，此处表示“虽然地球表面的四分之三被水覆盖”的含义，故选B。