________from space, the earth, with water_____seventy percent of its percentage, looks like a “blue ball.”
A．Seen; coveredB．Seeing; coveringC．Seeing; coveredD．Seen; covering
D

試題分析：考查非謂語動詞：句意“從太空看，有70%的水覆蓋它表面的地球就像一個藍(lán)色的球。第一空 過去分詞作條件狀語 它和主語the earth的關(guān)系是被動關(guān)系，第二空是過去分詞作狀語。第二空是with的復(fù)合結(jié)構(gòu)。Water和cover這里是主動關(guān)系，用現(xiàn)在分詞做賓語補(bǔ)足語，選D。
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