Metaphors are used in the following sentences EXCEPT "______"

A、 That young man is a bear at physics.
B、 His uncle is an old fox, up to all the evils.
C、 When I won the first prize in the competition, my mother was as proud as a peacock and told all the neighbours about it.
D、 Although he was 40 years old, he behaved like a 10-year-old schoolboy in front of his primary school teacher.

【正确答案】 C、D

【答案解析】 明喻是两个或更多不同事物之间的直接比较，一般用“like, as”引导；隐喻是含蓄比较。明喻和隐喻都必须满足两个条件：一方面本体和喻体必须是不同类的事物；另一方面本体和喻体必须有相似之处。由此可知，A、B两项为隐喻，C项为明喻，D项既不是明喻也不是隐喻。