题目内容：

    Mother lent them a watch so that they would not come home late. When they arrived at the railway, they looked up at the trees above it.

“What’s happening?” Peter said. “Look at the trees. They are m1..”

He was right. The trees were sliding down the hill. “It’s a landslide（滑坡）,” Roberta said. “The next train will come in five minutes. And the train is only about fifteen kilometers away.”

“We can r2. towards the train and wave（挥手） to the driver,” Phyllis said.

“He won’t think there is anything wrong,” Roberta said. “We a3.wave to him.”

“We need something red to wave,” Peter said. “Red is for d4..”

“Our petticoats（衬裙）are red!” Phyllis shouted. “Let’s take them off.”

“Mother will be a5.if you do that,” Roberta said. “Petticoats are expensive.”  

“People may die if there is an accident,” Peter said. “Petticoats are not important.”

Then Peter took a k6.from his pocket, cut the Petticoats into six pieces and put them on to sticks. Now they had six red flags. They ran a7.the railway line and waited at the side for the train to come. They had to wait a long time. Peter thought the w8.must be wrong, but it was the train that was late.

Then the train arrived. The children waved and waved their flags, shouting “stop, stop!” The driver saw the red flags and the children. He stopped the train b9. it hit the trees.

Luckily, they saved the train. “You are b10.and clever children,” the driver told them.