题目内容
【题目】 from the moon, our earth with water seventy percent of its surface, appears a blue ball.
A. Seen; covered B. Seen; covering
C. To see; covering D. Seeing; covered
【答案】B
【解析】
试题分析：考查非谓语动词。Seen from the moon：从月球上看，地球被看故用过去分词:our earth with water covering：地球被水覆盖，water作主语，应用现在分词covering。句意：从月球上看，地球表面百分之七十被水覆盖，看起来象个大蓝球。故选B
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