My son failed to come back home last night. This morning the police came to our house and ________ my worst fears that he was injured in a car accident.
A选项意为“提倡，拥护”；B选项意为“确认，确定”；C选项意为“允诺，许诺”；D选项意为“确保，保证”。题目意为“我儿子昨夜没回家。今早，警察来我家，________我最担心的是他在车祸中受伤。”结合题意选择B项，使我确认了我最担心的。
故正确答案为B。