The ship is said , the effect of is still unknown.
A. that it has sunk, it
B. to sink, which
C. that it has sunk, that
D. to have sunk, which
网友回答
A. that it has sunk, it
B. to sink, which
C. that it has sunk, that
(答案→)D. to have sunk, which
解析：考查非谓语动词及定语从句。be said to do = it’s said that…据说……，后一空考查定语从句，指代的前面的事情。句意：据说船已经沉了，它的影响还不知道。