阅读理解。 One afternoon, Kate and her brother, Bob, went out to play. Kate was eight, and Bob was ten. 'Let’s go to the bridge and we can see fish in the river.” said Kate. 'I don’t know…'Bob said. 'Mum told us, ‘Don’t go on the bridge.’ She said it’s dangerous.' Kate said, ' I am not afraid. Are you?' They walked onto the bridge and began looking for fish in the river. The bridge was a train bridge. Trains went over the bridge three times a day. The children were standing in the middle of the bridge when they heard a loud noise. 'A train is coming!' Bob shouted. “Run!” He ran to the end of the bridge. He was safe. Kate ran, too, but she fell. The train was coming fast. Kate ran towards Bob. She fell again right on the train tracks (铁轨). There was no time to leave. She had to lie down between the tracks. A few seconds later, the train went over the girl, but she was not hurt at all. She stood up and said to Bob, ' Don’t tell Mum! Don’t tell Mum!' At last their mother found out about the story. She was angry because they went on the bridge. But she was happy that Kate was all right. 1. Bob and Kate were ______. A. twins B. brothers C. sisters D. brother and sister 2. One afternoon they went to the bridge to see _____. A. their mother B. fish C. the train D. the river 3. When the train came, the children were _____. A. in the middle of the bridge B. at the end of the bridge C. on their way to the bridge D. away from the bridge 4. Where was Kate when the train was going over her? A. She fell again right on the train tracks (铁轨). B. Kate ran towards Bob. C. She had to lie down between the tracks. D. She stood up and cried. 5. When their mother knew about the story, she was _____. A. happy B. angry C. sorry D. both angry and happy