单选题
He did not tell his parents because he knew they would try to change his mind but he ______ in a colleague at work.
【正确答案】
D
【答案解析】confide“吐露(秘密)”，只有它与in搭配符合结构要求。engross常用于“engross one self in...”，意思为“全神贯注地做……”；involve用于“involve oneself in...”或“be involved in...”，指“参与……”；join是及物动词，应直接带宾语，意为“参加，加入”。