It Is safe to register the letter containing the check.

It Is safe to register the letter containing the check. It is better to be on the safe side It is dangerous here,please go to the ------- （safe） the girl at the register had to check my bag in case I had t The letter is to when it is safe （） the road the question is --- to land on the grassland A.if it is safe it is safe to draw the conclusion,not difficult to reach the cross和across有什么区别（When is the road is clear,it is safe to--- an area of water nest to the land,the ship inside it is safe if you are sure that the road is clear ,it is always safe to if you are sure that the road is c____,it is safe to cross t