少儿英语学单词原版书四年级第5本：Building a Case建立案件，本课学习侦探破案的过程，学习完后，完成课后的问题。

本课的单词有：case案件 clue线索 criminal罪犯 detective侦探 evidence证据 solution解决方案 suspect嫌疑犯 suspense悬念 witness证人

The police get a phone call. Someone robbed a store at the corner of Elm Street and Main Street! Money is missing from the cash register.警察接到一个电话，有人抢劫了在榆树街和主要街道拐角处的商店!钱从收银机里消失了。

Crimes like this happen every day. Every crime the police work on is called a case. It will take a team of detectives to solve the case of the store robbery.像这样的犯罪活动每天都在发生。警察着力于的每个犯罪事件都称为一个案件。这个抢劫商店的案子需要一个侦探团队来解决。

First, the team heads to the scene of the crime. One detective makes a floor plan of the store. Another takes pictures. Others write down what they see. This will help the team remember everything.首先，团队前往犯罪现场。一个侦探做了一个商店的平面图，另一个侦探拍照，别的侦探写下他们所看到的。这将帮助团队记得每一件事。

The detectives have many questions. When did the robbery happen? Did just one criminal rob the store, or was more than one person involved? How did the robbers get in?侦探们有许多疑问。抢劫是什么时候发生的?确实只有一个罪犯抢劫商店吗？同伙是不止一个人吗？强盗们是怎么进来的？

Maybe the criminals left a clue that will tell the detectives what happened. Here is a sack on the floor. Could it be a clue? The detectives carefully save it。罪犯可能会留下一丝线索，这将告诉侦探们发生了什么事。这是在地板上的一个袋子。这可能是一个线索吗？侦探们小心翼翼地将它存放起来。

The detective look for fingerprints. Fingerprints can be important evidence. They can help prove who was in the store last night.侦探在寻找指纹，指纹可能是个重要的证据。他们可以证明昨晚在店里的是谁。

The detectives talk to people who live nearby. Maybe the detectives can find a witness who saw the crime.侦探跟那些住在附近的居民谈话。也许侦探能找到看到犯罪的目击者。

Back at the police station, the detectives study the clues they found at the store. Even something small can help them find a solution, or answer, to the case.回到警局，侦探们研究着他们在商店发现的线索。甚至一些小细节都可以帮助他们找到此案的一个解决方案或答案。

They study fingerprints. They compare them to fingerprints from other crime scenes. They look for a match. A match might help them figure out who robbed the store.他们研究指纹，把它们与其他犯罪现场的指纹做比较。他们在寻求匹配的信息，这些可能帮助他们找出是谁抢劫了商店。

Some witnesses think they saw the criminal. A police artist listens to what they say. Then the artist draws a picture. Maybe someone will know whose picture it is.一些目击者认为他们看到了罪犯。一个警察画家听着他们所说的，然后画家画出一幅画。也许会有人会知道这张图片上的人是谁。

The case is beginning to make sense. The detectives think they know who committed the robbery. They ask all the police in town to help them find this suspect.此案开始有眉目了，侦探们认为他们已经知道是谁抢劫的。他们要求城里所有的警察来帮助他们找到这个嫌疑犯。

The detectives will ask the suspect questions. They will check the suspect's fingerprints. They will ask the witnesses if they think this is the criminal.侦探会问嫌疑犯问题。他们将检查嫌疑人的指纹。他们会问证人他们是否认为眼前这个人就是是罪犯。

There's a lot of suspense until the crime is solved. The detectives must get answers to all their questions.The police have all the evidence they need. They are ready to arrest the suspect. Soon the detectives hope to say,"Case closed!"
在案件解决之前总会有很多嫌疑犯。侦探必须得到所有的问题的答案。警察拥有了他们需要的所有证据，他们就准备逮捕嫌疑犯。侦探希望不久以后就能说：“结案！”

用单词clue和自己的语言完成以下句子：侦探仔细查看犯罪现场因为____。

为什么案件的解破方法必须是可行的？

为什么一个目击者可能比另一个要更有帮助？

证据是怎样有助于侦探的？

在本书中选一个已学单词，向你的搭档解释意思并举例。

想要做一个好的目击者吗？试试这个测试。自己观察你教科书中的图片，或看着你教室的窗外面。现在看别处。按下表填上图片或场景里的细节。试着回忆出细节。

用一个段落描写你看到的图片或场景。在你的描写中用上单词复习中的单词和细节。