it's not____to cross the road when the traffic lights are red.(safety)water freezes .water turns into ice.(合并)_____water freezes,____turns into ice.
问题描述：
it's not____to cross the road when the traffic lights are red.(safety)
water freezes .water turns into ice.(合并)
_____water freezes,____turns into ice.
答
1.safe
2.When,it