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 ______.[ ]
A. symptom
B. similarity
C. sample
D. shadow
答案
答案：A
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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
答案：A