________ from the moon, our earth with water ________ seventy percent of its surface looks like a blue sphere.
| A．Seen; covered | B．Seeing; covering | C．Seen; covering | D．Seeing; covered |
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________ from the moon, our earth with water ________ seventy percent of its surface looks like a blue sphere.
| A．Seen; covered | B．Seeing; covering | C．Seen; covering | D．Seeing; covered |
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