if you do like this f___some time,you are sure to learn b___

foot....bike

假如你有时候不喜欢这类步行，你应该学会自行车。

if you do like this for some time,you are sure to learn better.
如果你像这样做一段时间，你肯定会学得更好。

if you do like this for___some time,you are sure to learn before___