问题
选择题
It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________. (2012·湖北，29)
A．symptom
B．similarity
C．sample
D．shadow
答案
答案：A
句意为：定期进行眼查，看看是否有可能没有任何症状的眼疾的迹象，这是很重要的。symptom症状，符合句意。similarity类似；sample样本；shadow阴影，都与句意不符。