People often go across the road quickly.Often they can't see

car 人们因为在快速过马路的时候前面举着伞,通常他们看不见车
难道我没解释吗……
再问： Everyone knows that cars take long time to stop when it's rainning.So we must be more c_____ if we want to be safe.
再答： careful 小心的
每个人都知道下雨的时候需要很长的时间刹车，所以如果我们想安全就必须小心