问题
选择题
_______ from space, we can find 70% of the surface of the earth _______ by water.
A．Seeing …... covering
B．Seeing …... covered
C．Seen ...... covering
D．Seen …... covered
答案
答案：B
考查非谓语动词。第一空we与See 为主谓关系用现在分词作状语；第二空the earth与cover为动宾关系用过去分词。从太空上看我们发现地球百分之七十的表面被水覆盖着。