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Detective Maths · 数学王国失窃案（记叙文）

IELTS 4.0 基础使用者 · Unit 2 10 空 · 含选项翻译与逐空详解 参考答案，供核对
数学侦探主题插画
DETECTIVE MATHS
图例 LEGEND 浅黄色 = 填入的答案词 数字上标 = 对应题号 蓝波浪线 = 上文线索 绿波浪线 = 下文线索 蓝波浪线 = 上文线索 绿波浪线 = 下文线索 答案已填入原文，先通读全文再逐题核对解析

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Passage · 数字侦探如何找到失踪的数字

P1Once upon a time, there was a detective (侦探) named Detective Maths. He was very good at solving maths problems and loved to help people with their calculations. One day, he received a letter1 from the Maths Kingdom. The letter said that a number had gone missing in the kingdom. The king asked Detective Maths to help his kingdom!

P2Detective Maths packed2 his notebook and pencil and set off. He soon arrived in the Maths Kingdom, a place filled with colourful numbers and friendly maths symbols3. On seeing him, the king said, "Because of the missing number, all our calculations are wrong4. I know you have the ability5 to solve this case (案件). Please help us."

P3Detective Maths immediately started investigating (调查) by talking to the numbers and symbols. He asked them if they had seen anything strange6 or unusual. The numbers and symbols said no.

P4Then Detective Maths checked7 all the calculations in the kingdom. After working out many maths problems and puzzles for a long time completely8, Detective Maths finally found that the missing number was 5. He also discovered a number thief hiding in a secret cave. The thief was a little number named Zero. Zero took away9 the missing number because he wanted to be the only number in the Maths Kingdom. Detective Maths said to Zero that all numbers were important10 and that they needed to work together to make the kingdom organized and beautiful.

完形填空解题策略

STRATEGY · 四步做题法
1

通读

先不看选项通读全文，把握故事主线：数字王国丢了数字 5，侦探破案。

2

推理

逐空根据上下文逻辑推理：转折、因果、指代、词义复现都是线索。

3

回读

填完词后回读所在句与前后句，检查搭配（动词时态、固定短语）是否通顺。

4

验证

把答案带入整篇通读，验证故事情感、逻辑、语法都成立，警惕无中生有的干扰项。

1
he received a letter from the Maths Kingdom.

他收到一封来自数学王国的信。

名词辨析 · 后文复现

  • A. key钥匙

    与“信中说……”不衔接。

  • B. letter信

    下一句 The letter said... 直接复现，答案 B。

  • C. note便条

    便条较短，后文用 letter 呼应。

  • D. message消息

    message 一般是口头/电子消息。

定位下一句 “The letter said...”
依据前后两句 letter 原词复现，选 letter。
答案B letter。名词题优先找下文的复现词。
2
Detective Maths packed his notebook and pencil and set off.

数学侦探收拾好笔记本和铅笔就出发了。

动词辨析 · 动作链

  • A. bought买

    “买笔记本和铅笔”与出发破案无关。

  • B. borrowed借

    “借”不符合带自己装备出发的场景。

  • C. packed收拾，打包

    “收拾好……就出发”是自然动作链，答案 C。

  • D. threw扔

    “扔笔记本”语义错误。

定位“packed his notebook and pencil and set off”
依据收拾东西（pack）→ 出发（set off），动作先后衔接。
答案C packed。动词题看动作顺序与搭配。
3
a place filled with colourful numbers and friendly maths symbols.

一个充满彩色数字和友好的数学符号的地方。

名词辨析 · 场景

  • A. friends朋友

    “数学朋友”不符合数字王国的设定。

  • B. skills技能

    “友好的技能”说不通。

  • C. puzzles谜题

    “友好的谜题”不通。

  • D. symbols符号

    数字王国里数字与数学符号（+ - × ÷）共存，答案 D。

定位“colourful numbers and friendly maths ___”
依据与 numbers（数字）并列的是数学符号 symbols。
答案D symbols。并列题看两类事物是否同类。
4
all our calculations are wrong.

我们所有的计算都错了。

形容词 · 因果逻辑

  • A. wrong错误的

    数字丢失 → 计算全错，因果成立，答案 A。

  • B. correct正确的

    丢了数字计算不可能正确。

  • C. excellent极好的

    与“数字丢失”矛盾。

  • D. curious好奇的

    计算不能说“好奇”。

定位“Because of the missing number, all our calculations are ___”
依据Because of 引出原因，数字缺失的后果就是计算错误。
答案A wrong。因果题先找“原因 → 结果”。
5
I know you have the ability to solve this case.

我知道你有破案的能力。

名词辨析 · have the ability to do

  • A. power力量，权力

    “有力量去破案”不如 ability 准确。

  • B. ability能力

    have the ability to do sth. 固定搭配“有能力做某事”，答案 B。

  • C. method方法

    “有方法去破案”说法生硬。

  • D. trick把戏，窍门

    破案靠能力而非“把戏”。

定位“have the ___ to solve this case”
依据have the ability to do sth. 是高频固定搭配。
答案B ability。搭配题直接记固定短语。
6
if they had seen anything strange or unusual.

他们是否见过任何奇怪或不寻常的东西。

形容词辨析 · or 并列

  • A. interesting有趣的

    与 unusual（不寻常）不同类。

  • B. wonderful精彩的

    与破案场景不搭。

  • C. unique独特的

    独特不等于“可疑”。

  • D. strange奇怪的

    strange or unusual 是同义并列（奇怪或不寻常），答案 D。

定位“anything ___ or unusual”
依据or 连接近义词：strange（奇怪的）与 unusual（不寻常的）。
答案D strange。or / and 前后常为同类词。
7
Detective Maths checked all the calculations in the kingdom.

数学侦探检查了王国里所有的计算。

动词辨析 · 破案动作

  • A. called打电话

    “给计算打电话”不成立。

  • B. checked检查

    侦探“检查所有计算”找出问题所在，答案 B。

  • C. counted数

    “数计算”搭配不当。

  • D. collected收集

    “收集计算”不如“检查”贴合破案。

定位“checked all the calculations in the kingdom”
依据破案流程：调查询问 → 检查计算 → 发现缺失数字。
答案B checked。动词题按故事情节顺序判断。
8
After working out many maths problems and puzzles for a long time completely, ...

在彻底解决了许多数学问题和谜题、花了很长时间之后……

副词辨析 · 方式修饰

  • A. rightly正确地

    “正确解决”与下文“finally found”不强调。

  • B. quickly快速地

    与 for a long time（很长时间）矛盾。

  • C. definitely肯定地

    修饰“解决”不通顺。

  • D. completely完全地，彻底地

    彻底解决大量题目后终于找到答案，答案 D。

定位“working out many maths problems and puzzles ... completely”
依据completely 修饰“解决”，表示彻底完成排查。
答案D completely。副词题看它修饰哪个动作。
9
Zero took away the missing number because he wanted to be the only number.

零带走了失踪的数字，因为他想成为数学王国里唯一的数字。

短语动词辨析 · 因果

  • A. put off推迟

    “推迟数字”语义不通。

  • B. show off炫耀

    “炫耀数字”不符合“偷走”的行为。

  • C. took away带走，拿走

    数字失踪 = 被 Zero 拿走（took away），答案 C。

  • D. gave away赠送

    “赠送数字”与“想当唯一数字”矛盾。

定位“Zero ___ the missing number because he wanted to be the only number”
依据想成为唯一 → 拿走别人 → took away。
答案C took away。短语动词结合行为动机判断。
10
all numbers were important and that they needed to work together.

所有数字都很重要，它们需要一起合作。

形容词 · 主题升华

  • A. useless无用的

    “无用却要合作”逻辑矛盾。

  • B. valueless无价值的

    同上，与主题相反。

  • C. important重要的

    “每个数字都重要，要合作”是故事主题，答案 C。

  • D. helpless无助的

    “无助的数字要合作”偏离主题。

定位“all numbers were ___ ... work together to make the kingdom organized”
依据结尾点题：每个数字都有价值，需要合作。
答案C important。完形结尾常考主题升华。

一材多练

EXERCISE · 用所给单词的适当形式填空
  • 1. I found a missing (miss) book under the sofa while cleaning the room.打扫房间时，我在沙发下发现了一本丢失的书。
    答案：missing（miss → missing 形容词“丢失的”）
  • 2. The streets are lit up with colourful (colour) lights during the Spring Festival.春节期间，街道被五颜六色的灯照亮。
    答案：colourful（colour → colourful 形容词“多彩的”）
  • 3. When the bell rang, the students stopped talking immediately (immediate) and opened their books.铃声一响，学生们立刻停止说话并打开书本。
    答案：immediately（immediate → immediately 副词“立刻”）

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P1 · 案件发生

S1Once upon a time, there was a detective named Detective Maths.从前，有一位名叫“数学侦探”的侦探。

S2He was very good at solving maths problems and loved to help people with their calculations.他非常擅长解决数学问题，并且乐于帮助人们计算。

S3One day, he received a letter from the Maths Kingdom.一天，他收到了来自数学王国的一封信。

S4The letter said that a number had gone missing in the kingdom.信上说王国里有一个数字失踪了。

S5The king asked Detective Maths to help his kingdom!国王请求数学侦探帮助他的王国！

P2 · 侦探出发

S1Detective Maths packed his notebook and pencil and set off.数学侦探收拾好笔记本和铅笔就出发了。

S2He soon arrived in the Maths Kingdom, a place filled with colourful numbers and friendly maths symbols.他很快到达了数学王国，一个充满彩色数字和友好的数学符号的地方。

S3On seeing him, the king said, "Because of the missing number, all our calculations are wrong.一看到他，国王就说：“因为数字失踪，我们所有的计算都错了。

S4I know you have the ability to solve this case.我知道你有能力解决这个案子。

S5Please help us."请帮帮我们。”

P3 · 走访询问

S1Detective Maths immediately started investigating by talking to the numbers and symbols.数学侦探立即开始调查，与数字和符号交谈。

S2He asked them if they had seen anything strange or unusual.他问他们是否见过任何奇怪或不寻常的东西。

S3The numbers and symbols said no.数字和符号都说没有。

P4 · 真相大白

S1Then Detective Maths checked all the calculations in the kingdom.然后数学侦探检查了王国里所有的计算。

S2After working out many maths problems and puzzles for a long time completely, Detective Maths finally found that the missing number was 5.在花很长时间完整算出许多数学题和谜题之后，数学侦探终于发现失踪的数字是 5。

S3He also discovered a number thief hiding in a secret cave.他还发现了一个藏在秘密洞穴里的数字小偷。

S4The thief was a little number named Zero.小偷是一个名叫零的小数字。

S5Zero took away the missing number because he wanted to be the only number in the Maths Kingdom.零偷走了失踪的数字，因为他想成为数学王国里唯一的数字。

S6Detective Maths said to Zero that all numbers were important and that they needed to work together to make the kingdom organized and beautiful.数学侦探对零说，所有数字都很重要，它们需要一起合作，让王国变得有序而美丽。

作文金句仿写

WRITING BOOST · 黑色为框架，灰色底纹为可替换词

把文中的好句子拆成“句型框架”，换上你自己的词，就能写出漂亮的句子。

金句 1He was very good at solving maths problems and loved to help people.

My friend / My teacher / I am / is very good at solving problems / playing basketball / singing and loves / love to help people / others / classmates.

仿写：My friend is very good at playing basketball and loves to help others. 我的朋友很擅长打篮球，并且乐于助人。

适用：介绍某人特长与品质。

金句 2All numbers are important and they need to work together.

All numbers / team members / students are important and they / we need to work together / help each other.

仿写：All team members are important and we need to work together. 每个队员都很重要，我们需要一起合作。

适用：写团队合作、班级团结。

金句 3After working out many maths problems, Detective Maths finally found the answer.

After working hard / practising / trying again and again, I / he / she finally found the answer / succeeded / made it.

仿写：After practising again and again, I finally made it. 经过反复练习，我终于做到了。

适用：写坚持与努力后的成功。

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