问题补充:
The child, who was believed by a tiger, was found in a forest.
A. to be killed
B. having killed
C. to have been killed
D. to be killing
答案:
A. to be killed
B. having killed
(答案→)C. to have been killed
D. to be killing
解析:考查非谓语动词。“sb. /sth. +be+believed+to do”表示“某人/某物被认为??”,动词不定式用一般式,表示其动作发生在谓语动作之后,如若用完成式,则表示发生在谓语动作之前,若用动词不定式的被动式,则表示与句子主语之间是逻辑上的被动关系。句意:据说已经被老虎吃了的孩子,在森林里面被找到了。选C。