完型填空 开头是Brandon was a six-year-old boy… 谁会,

It was getting dark. Some children and two Canadian women were still 1 on the ice near a big hotel. They were having a good time.
Suddenly the ice 2 . One of the boys fell into the water. The children shouted,“Help! Help!” They didn’t know 3 to do. The two Canadian friends heard 4 and skated over to get the boy out of the water.