A sharp sword was found buried together with the royal carpenter, which was believed _____himself________against grave robbers.
A.used to defend
B.being used to defend
C.to be used to defending
D.to be used to defend
网友回答
D解析第一空考查句型：Sb/sth is believed to do…,所以只能在C、D里面选择，第二空填to defend表示目的状语。选D。