EP12 At the Crime Scene

At the Crime Scene | 短故事＋5个词＋present perfect with indefinite past result 现在完成时＋小练习

Listening Text

P1: It is 5:30 a.m., and the city is still quiet. Suddenly, your phone rings. It is a police officer. He tells you that someone has broken into a famous jewelry store downtown. They need your help right away because you are a crime scene investigator. When you arrive, the air is cold. You see a broken window at the back of the store. There are many glass pieces on the ground. You also find some strange footprints and tire marks in the mud. The crime happened in the past, but the clues are all here now.

P2: You put on your gloves and look closely at the footprints. They are very large and deep, so the thief was probably a heavy man. You use a ruler to measure the space between each step. As the prints get closer to the tire marks, the spaces between them get bigger. This tells you that the man ran quickly to a car. Interestingly, the footprints end exactly at the passenger's side of the car. This is a very important clue. It means the thief did not act alone. Someone else was in the driver’s seat, ready to go.

P3: Next, you look for clues that the eyes cannot easily see. You find some clear fingerprints on the glass of the broken window. You also find a single piece of hair on a shelf. This is lucky because hair contains a person's DNA. Using a powerful computer at the lab, you can compare these fingerprints and DNA with records from millions of people. If the computer finds a match, you will know whose fingerprints or DNA were found in the store. For a crime scene investigator, making these links between the past and the present is just part of the job.

Words

- clue: a piece of information that helps you solve a crime or a problem.
- thief: a person who steals things from others.
- footprint: the mark made by a person’s shoe or foot on the ground.
- compare: to look at two things to see how they are similar or different.
- match: two things that are exactly the same.

Practice

Complete the sentences using the present perfect (have/has + past participle):

1. Someone ________ the window. (break)

2. She ________ a new job. (find)

3. I ________ my lunch. (finish)

4. I ________ my keys. (lose)