His friends found to tell him everything that had happened.
A. it necessary
B. that necessary
C. it is necessary
D. necessary
网友回答
(答案→)A. it necessary
B. that necessary
C. it is necessary
D. necessary
解析：在英文中find后跟动词不定式作宾语加形容词作补语，可用it作为形式宾语，真正的宾语位于句尾用动词不定式，故本题选A。