Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
Doctors are now using surgery to preserve （ ） in many people with a certain disease who would otherwise go blind. (eye；sight)
【正确答案】：EYESIGHT
【题目解析】：
根据前文preserve动词，后面应该跟名词，这里应该是保护视力，所以应该填eyesight。句意：医生们现在正在使用外科手术来保护许多患有某种疾病的人的视力，否则他们就会失明。