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．symptomB．similarity
C．sampleD．shadow
A

句意為：定期進(jìn)行眼查，看看是否有可能沒有任何癥狀的眼疾的跡象，這是很重要的。symptom癥狀，符合句意。similarity類似；sample樣本；shadow陰影，都與句意不符。
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