Scientists found many stones --- with number on the mountains.A.marking B.marked C.being markedD.ha

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Scientistsfoundmanystones---withnumberonthemountains.A.markingB.markedC.beingmarkedD.haScientistsfou

Scientists found many stones --- with number on the mountains.A.marking B.marked C.being markedD.ha
Scientists found many stones --- with number on the mountains.A.marking B.marked C.being markedD.ha

Scientists found many stones --- with number on the mountains.A.marking B.marked C.being markedD.ha
B 直接用过去分词表示被动,或者状态.
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答:b. marked

B.marked
mark在这里作定语,修饰stone,它与stone是被动关系——石头是被做标记的,所以用了过去分词形式。
C项也表示被动,但它表示动作正在进行,而题中mark这个动作是过去了的,所以排除C。
D项是having marked吧?have done表示主动,所以排除D。如果D项是having been marked,那D也可以选,因为having bee...

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B.marked
mark在这里作定语,修饰stone,它与stone是被动关系——石头是被做标记的,所以用了过去分词形式。
C项也表示被动,但它表示动作正在进行,而题中mark这个动作是过去了的,所以排除C。
D项是having marked吧?have done表示主动,所以排除D。如果D项是having been marked,那D也可以选,因为having been done也表示被动和完成。

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A主动

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