请问为什么用covering ：seen from the moon,our earth ,with water cov

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请问为什么用covering ：seen from the moon,our earth ,with water covering
_______ from the moon,our earth with water ______ twenty percent of its surface,appears as a blue ball.
a.Seen,covered b.Seen,covering
.第一空我懂 ,想知道cover为什么用ing ,不是被水覆盖的吗?

第二问是考with 的复合结构.动词的现代分词表主动,水是主动覆盖在地表的,按照你的理解,twenty percent of its surface is cover by water.
而此句是water covers the twenty percent of its surface.

请问为什么用covering ：seen from the moon,our earth ,with water cov Seen form the moon,the earth with water covering 70% of it's Seen from the moon,our earth ,with water c_______ eventy of 改错:seeing from space,the earth,with water covering _____form the moon,the earth with water covering 70% of it's 19、(单选题)__________ from the moon,our earth,with water ______ seen from the moon ,our earth looks like a big bright dish ____from space,our earth,with water covering 70% of its surf _______from space,our earth,with water covering 70/ of its s 为什么seem from the moon,the earth looks like a blue water glob Water From The Moon 歌词 () from space,the earth,with water () seventy percent of its