He believes his ( ) may have spared many of these children from their parents' punishment for not being awarded a book.

　　A.intervention

　　B.interference

　　C.obstruction

　　D.annoyance

　　【答案】A。“他相信他的介入或调停可以让这些孩子免受父母的惩罚”。intervention： 介入、调停;interference：干扰、冲突;obstruction：障碍、阻碍;annoyance：打扰、烦恼。 结合句意可知补充“介入”更合适，故正确答案是选项 A。