题目内容

_______to improve the students’sight,  the eye exercises are done in schools nationwide.
A．Being designedB．To designC．DesigningD．Designed
D
本题考查非谓语动词。句意：为提高学生的视力而编制的眼保健操，在全国学校内推广。句子的主语为the eye exercises，与design之间为动宾关系，用被动形式；being designed表被动、进行，不合题意。因此选D。
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