What is the hardest thing about learning to ride a bicycle?地面（The ground）,怎么会是这个答案呢?谁能帮我解释下啊

what is the hardest thing about learning skating The hardest yictory is over 英语翻译What do you study the hardest? What is the hardest thing about learning to ride a bike这是英语谜语, the hardest part of skating is the the beginning is always the hardest是什么意思? what was the hardest part of your record -breaking what'a the hardest thing about learning toride a bike? the first step is always the hardest的意思 The first step is the hardest的中文意思 The first step is aiways the hardest.翻译 The hardest step is over the threshold.是什么意思? I think the hardest thing is,or what I struggle with,is letting kids know how serious it is.这有几个结构啊 the hardest thing to understand is time 怎么翻译 What is the hardest thing about learning to ride a bicycle?地面（The ground）,怎么会是这个答案呢?谁能帮我解释下啊 what do you think is the hardest thing about being a parent?why?话题essay6小节 每节4到5句话急用啊.具体一点好伐。 What is the hardest thing about learning to ride a bicycle? 什么是最难的事关于学会乘驾自行车?不知到答案 the alphabet goes form a to z.what goes from a to z还有这几题~What goes to sleep with its shoes on?What animal wears big black glasses on its face?What key is the hardest to turn?