It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.
A．symptomB．shadowC．treatmentD．convenience
A

試題分析：考查名詞辨析。A ，病癥，癥狀；B陰影，影子； C 治療，D方便，句意：定期對(duì)眼睛進(jìn)行檢查是很重要的，以便檢查出任何可能的眼部疾病的征兆，這些疾病可能是沒(méi)有癥狀的。選A。
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