it's ery dangerous ---a child --- ---- a bike on the busy street .对于一个小孩来说,在繁忙的街道上
问题描述：
it's ery dangerous ---a child --- ---- a bike on the busy street .对于一个小孩来说,在繁忙的街道上
答
for , to ride
答
什么问题.?
答
it's very dangerous for a child to ride a bike on the busy street