三、完形填空(共15小题，每小题1分，满分15分)
Last Thursday, our class had a science lab lesson. Ms Li reminded us, “No eating in the lab, and follow the 36 with chemicals.”
Tom whispered to me, “Will we do a cool experiment?”
“Focus — these chemicals are dangerous if 37 .” I said.
Suddenly, Sarah cried, “Ms Li! The alcohol lamp fell over!” A small fire started on her table, and paper began to 38 . Ms Li rushed over: “Don't 39 ! Sarah, step back. Tom, get the fire extinguisher. Lily, call the guard — Lab 302 is on fire.”
Tom grabbed the extinguisher, and asked 40 : “How to use this?”
“Pull the pin, point at the fire's base, 41 the handle.” Ms Li showed him. She sprayed it, and the flame started to 42 .
Soon the guard arrived with a hose(消防水带). “Is everyone okay?” Ms Li nodded, “Thanks — fire's almost out.”
After putting out the fire, Ms Li said, “We handled this well 43 we stayed calm. Sarah, why did the lamp fall?”
Sarah looked down, “I knocked it over 44 for my notebook. Sorry!”
Ms Li patted her, “Mistakes happen, but keep things 45 from lamps. If fire's big, don't 46 it — run and ask for help.”
On the way back, Tom said, “I'm glad Ms Li 47 what to do.” I agreed, “Safety's the most 48 thing now.”
We didn't finish the experiment, but learned a more 49 lesson — caution(谨慎) and emergency skills save lives. Now we pay more attention to lab safety. No one wants to 50 such a scary moment again. We're all grateful for Ms Li's calm guidance that day.
()36. A. plans
B. rules
C. orders
D. dreams
()37. A. misused
B. stored
C. collected
D. watched
()38. A. shake
B. break
C. fly
D. burn
()39. A. cry
B. panic
C. run
D. move
()40. A. nervously
B. loudly
C. carelessly
D. happily
()41. A. push
B. press
C. turn
D. throw
()42. A. fall down
B. turn down
C. die down
D. put down
()43. A. so
B. but
C. because
D. though
()44. A. waiting
B. looking
C. longing
D. reaching
()45. A. close
B. far
C. high
D. low
()46. A. fight
B. leave
C. cover
D. hide
()47. A. guessed
B. forgot
C. knew
D. wondered
()48. A. interesting
B. important
C. difficult
D. expensive
()49. A. common
B. boring
C. simple
D. valuable
()50. A. experience
B. miss
C. avoid
D. forget

36.B 37.A 38.D 39.B 40.A 41.B 42.C 43.C 44.D 45.B 46.A 47.C 48.B 49.D 50.A

【解析】
36. 结合实验室场景，使用化学品需遵守相关规则，"rules"（规则）符合语境，故选B。
37. 化学品若被误用会有危险，"misused"（误用）契合句意，故选A。
38. 桌子起火后纸张会开始燃烧，"burn"（燃烧）符合逻辑，故选D。
39. 火灾发生时老师提醒不要恐慌，"panic"（恐慌）符合应急场景要求，故选B。
40. Tom面对突发火情，拿到灭火器时会紧张地询问用法，"nervously"（紧张地）符合情绪状态，故选A。
41. 使用灭火器的操作步骤之一是按压把手，"press"（按压）是正确动作，故选B。
42. 喷洒灭火器后火焰会逐渐减弱平息，"die down"（逐渐减弱）符合语境，故选C。
43. 我们能妥善处理火情是因为保持了冷静，"because"引导原因状语从句，故选C。
44. Sarah是伸手拿笔记本时碰倒了酒精灯，"reaching"（伸手）符合动作描述，故选D。
45. 老师提醒要让物品远离灯具，"far from"（远离）是固定搭配，故选B。
46. 火势较大时不要扑救，应及时求助，"fight"（此处指扑救）符合句意，故选A。
47. 大家庆幸李老师知道如何处理火情，"knew"（知道）符合语境，故选C。
48. 经历火灾后意识到安全是最重要的事，"important"（重要的）契合文意，故选B。
49. 这次意外让大家学到了更有价值的一课，"valuable"（有价值的）符合语境，故选D。
50. 没人想再经历这样可怕的时刻，"experience"（经历）符合句意，故选A。
【答案】
36.B 37.A 38.D 39.B 40.A 41.B 42.C 43.C 44.D 45.B 46.A 47.C 48.B 49.D 50.A
【知识点】
1. 完形填空语境辨析
2. 动词短语辨析
3. 安全场景词汇
【点评】
本文以实验室突发火灾为背景，考查词汇辨析、固定搭配及逻辑推理能力，同时传递了实验室安全规范与应急处理的重要性，兼具语言考查与安全教育意义。
【难度系数】
0.6