题目

We looked at each other        surprise when we heard a bird singing “Happy birthday to you”. A．in      B．to      C．by     D．at 答案：A小孩在结冰的河面上玩耍，突然发现脚下的冰层即将破裂，他应采取的措施是A.站着不动B.赶快向上跳起C.立即改成单脚独立D.轻轻伏在冰面上并向岸边挪动