第30题: [单项选择]They remained constantly attentive to their goal, as a sunflower always turns and stays focused on the sun. A. metaphor B. simile C. alliteration D. metonymy 参考答案:B 答案解析:解析:句意:他们一直坚持着自己的目标,就像向日葵总是向着太阳转动。句中出现了比喻词“as”,把这些人比做了向日葵,因此该句是明喻,即simile,B项正确。