Climbing hills is of great help to our health.为什么用of?

Climbing hills is of great help to our health.为什么用of? Kitty is climbing _____ the hills But of all the things people do,climbing hill is the most popular.同一句转换.=But climbing hills is more popular than ___ ___things people do. ---- is good evercise.climbing hills is climbing the hill is 选择哪一个为什么? climbing hills ____of great help to our health A.was B.were C.is D.are 选哪一个?of做什么成分? Climbing hills are/is good for your health.这句用are还是is,或者是别的 Climbing hills _ of great help to health.A.isB.areC.wereD.be climbing hills ___of great help to out healtha.was b were c is d are Fall is a good time for climbing hills 同义句转换 急用!谁会啊! 急用! He is afraid of climbing that tall tree .翻译 A snail is climbing out of a well. he,does,hills,like,climbing（连词成句) we were all t_ after climbing the hills 根据短文,回答问题111111111 Benny is a naughty boy,he doesn't like running.He likes climbing hills.He often does it on Saturday with his friend Lucy.They are not in the same class.Lucy likes dancing and painting.She likes climbing hills,too.He simile和metaphor的区别,有句子Climbing hills is a great teacher.这是用了什么修辞手法?是simile还是metaphor?The world is a stage.这个是Simile，也是用is的，我需要系统的回答。 Mountain climbing is very popylar in many parts oMountain climbing is very popylar in many parts of the world.Oko Suki lives climbing is good for health “Hard hills of rock became rivers of