Doing eye exercise 中为什么eye不用复数?

Doing eye exercise 中为什么eye不用复数? Doing eye exercise is good for our eyes Doing eye exercise is good for our eyes Doing eye _______ (exercise) is good _______ our _______.(eye) 填写答案并说明原因. ______ is good ______ your health.A.Do eye exercise,for B.Doing exercise,for C.Do eye exercises,to D.Doing eye exercises,to 翻译 做眼保健操对你眼睛有好处 Doing eye exercise( ) ( ) Doing eye ＿＿（exercise）is good for your eyes. 补全单词 Doing eye exercise is good f__ your eyes. do eye exercise什么意思 __ eye exercise __ good __ your eyes.为什么?A.doing__ eye exercise __ good __ your eyes.为什么?A.doing,are,forB.do,is,forC.doing,is,forD.do,are,to 眼保健操的英语表达eye exercise exercise加不加s 知道的帮帮忙哈!最好能给个理由哈!Doing eye exercise _well in _our eyesight.A.work;protecting.B.works;protecting.C.work;protect you must keep your eyes -----when you do eye exercise（-----中填close还是closed）并说说为什么 they like doing exercise根据doing exercise 提问? Doing sports___ (ttcavseiii) means exercise. doing morning exercise加不加S 关于exercise的用法morning exercise和eye exercise后要不要加“s” doing exercise every day makes me prtty fit.中为什么填mdke的单三呢 _____(do) eye exercise is good for our eyes.