C
One sunny Saturday morning, as usual, Tom was reading a newspaper to his old neighbour Mrs Bell in her garden. Suddenly Mrs Bell cried out and put her hand to her heart.
“Mrs Bell, are you okay?” asked Tom, very worried.
“I think I'm having a heart problem!” she said in a weak voice. Her face turned white, and she broke out in a cold sweat(流汗).
A heart problem! Tom was surprised, but the eleven - year - old boy breathed(呼吸) deeply a few times to calm himself down. He remembered a lesson he had learned in a summer camp. In an emergency(紧急情况), you must stay calm.
Who could he turn to for help? Mrs Bell lived alone, so there was nobody around. His parents were out shopping for the old lady.
He quickly took out his phone and called the emergency number. He told the operator(接线员) clearly where Mrs Bell lived and what happened. The operator said an ambulance(救护车) was on its way.
“Tom, get me the blue bottle by my bed,” said Mrs Bell. Tom ran into the house and got Mrs Bell's heart medicine. She took some.
When the ambulance arrived, two doctors gave Mrs Bell first aid at once. One of them said, “You must be the boy who called us.” Tom nodded. “Well done!” the doctors said.
After they left for the hospital, Tom thought to himself, “Mum often says she is happy to be a rainbow in someone's cloud. Now I seem to understand what she means.”
()18. What did Tom do first after Mrs Bell fell ill?
A. He took out his phone to call for help.
B. He ran into the house to get medicine.
C. He breathed deeply and calmed himself down.
D. He read the newspaper to help her relax.
()19. How did Tom know what to do in the emergency?
A. Mrs Bell told him the steps. B. He learned it in a summer camp.
C. His parents taught him before. D. The operator gave some information.
()20. What may happen next?
A. The doctors will teach Tom first aid. B. Tom's parents will get angry with him.
C. Tom will forget the emergency lesson. D. Mrs Bell will thank Tom for saving her.
()21. What is the story mainly about?
A. The danger of heart problems. B. The importance of summer camp lessons.
C. How to use a phone in emergencies. D. A boy helping his neighbour in danger.

C
【文章大意】本文是一篇记叙文，讲述了一个 11 岁男孩汤姆在邻居贝尔夫人突发心脏病时冷静应对并成功将其救助的故事。
18. C 细节理解题。根据“Tom was surprised, but the eleven - year - old boy breathed deeply a few times to calm himself down.”可知，汤姆首先深呼吸让自己冷静下来，故选 C。
19. B 细节理解题。根据“He remembered a lesson he had learned in a summer camp.”可知，汤姆是通过夏令营学到的应急知识，故选 B。
20. D 推理判断题。根据全文内容和“Well done!”等细节可以推断，接下来贝尔夫人会感谢汤姆的救命之恩，故选 D。
21. D 主旨大意题。通读全文可知，这个故事主要讲述了一个男孩帮助处于危险中的邻居的故事，故选 D。

【分析】
这是一篇记叙文阅读理解题，涵盖细节理解、推理判断、主旨大意三类题型。解题思路为：先通读全文把握文章大意，再针对每个小题的问题，回到原文定位相关语句，对比选项逐一排除错误答案，选出与原文信息一致或符合逻辑的选项。
【解析】
18. 细节理解题。根据原文“Tom was surprised, but the eleven-year-old boy breathed deeply a few times to calm himself down.”可知，贝尔夫人生病后，汤姆首先深呼吸让自己冷静下来，对应选项C。
19. 细节理解题。根据原文“He remembered a lesson he had learned in a summer camp.”可知，汤姆是在夏令营学到的应急知识，对应选项B。
20. 推理判断题。根据全文汤姆冷静救助贝尔夫人，以及医生夸赞“Well done!”的细节，可推断接下来贝尔夫人会感谢汤姆的救命之恩，对应选项D。
21. 主旨大意题。通读全文可知，故事主要讲述了11岁男孩汤姆在邻居贝尔夫人突发心脏病时，冷静应对并成功救助的经历，即男孩帮助处于危险中的邻居，对应选项D。
【答案】
18.C 19.B 20.D 21.D
【知识点】
英语阅读理解、细节理解题、推理判断题、主旨大意题
【点评】
本文为贴近生活的记叙文，考查学生快速定位原文信息、逻辑推理及概括主旨的能力，解题关键是准确找到原文对应依据，难度适中。
【难度系数】
0.6