_______ from space, we can find 70% of the surface of the earth _______ by water.
A．Seeing …... coveringB．Seeing …... covered
C．Seen ...... coveringD．Seen …... covered
B
考查非謂語動(dòng)詞。第一空we與See 為主謂關(guān)系用現(xiàn)在分詞作狀語；第二空the earth與cover為動(dòng)賓關(guān)系用過去分詞。從太空上看我們發(fā)現(xiàn)地球百分之七十的表面被水覆蓋著。
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