It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.
A.symptom
B.similarity
C.sample
D.shadow
网友回答
A解析考查名词辨析。难度中等。【解题思路】句意为：定期检查眼睛看看是否有眼疾症状很重要。A项意为“症状”，符合句意；B项意为“类似”，C项意为“样本”，D项意为“阴影”，都与语意不符。