单选题
His thoughts were ______ from the painful topic by the sudden arrival of a close friend.
【正确答案】
B
【答案解析】[解析] dissuaded“劝阻，劝止，劝诫”；dissuade sb．from doing“企图劝阻某人”；distracted“分神的，分散注意力的”；distract from“分散或扰乱某人注意力”；discerned“辨别，分清”；discounted“折扣，让头”。答案是B。