Trafficlightsarered,yellowandgreen.Theyareveryimportant...

問題詳情：

Traffic lights are red, yellow and green. They are very important signals (信號). Traffic lights are usually placed at busy street corners to help control traffic Sometimes, they are on streets near schools and shops, too. Most young children are taught what each of the colored lights means, so everybody can stay safe.

The first traffic signals were used for trains. The signals were put alongside railway tracks  ( (軌道). The color red was used to mean "stop" because it warned people of danger. A red light was also the easiest color to see from a distance. Train drivers could see the red "stop" light ahead and had enough time to slow down and stop their trains. A green light was used to mean "take care" and a white light meant "go".

However, there were many dangerous accidents on the train tracks. Some train drivers thought a star shining in the night sky was a white light that meant "go"". So the signals were swapped. The "go" light was changed to green and the "take care" light was changed to white.

During these times, people travelled by train or in carts pulled by horses. Years later, when cars were built, people began to drive them because they could travel much faster than horses. However, the road rules for drivers were not very clear and many people were hurt crossing the roads. Yellow warning signs had to be placed beside the roads to remind drivers to take care and allow people to cross safely.

Today, towns and cities all over the world have traffic lights. Red and green lights match the signals used on the railways. Yellow lights are easy to see, so they are used to warn drivers that they should slow down and prepare to stop.

19. Why was the color red used to mean "stop"?

A. It reminded people of traffic rules.

B. It helped trains run smoothly.

C. It gave people a warning of danger.

D. It was the first color people thought of.

20. What does the underlined word "swapped" in Paragraph 3 mean?

A. Designed.               B. Exchanged.              C. Suggested.               D. Compared.

21. In which order did the "take care" light develop?

a. A white light             b. A green light.                  c. A yellow light.

C. a一c一b        B. b一c一a               A. a一b一c               D. b一a一c

22. What is the passage mainly about?

A. The advantages of traffic lights.             B. The history of traffic lights.

C. The importance of traffic lights.             D. The meanings of traffic lights.

【回答】

CBDB

文章大意:本文主要講述了紅綠燈的發展由來一一從火車上的演變到今天馬路上能見到的交 通信號燈。

1.       事實細節題。根據第二段第三句 The color red was used to mean "stop" because it warned people of danger可知，火車使用紅*的標誌牌是想*告人們危險。C選項“它 給人們以危險的*告”與原文意思相符，故選C。

2.       詞義猜測題。根據第二段最後一句 A green light was used to mean "take care" and a white light meant “go”可知，綠燈意味着小心，白燈意味着通行。而第三段swaped 後的一句話 The "go" light was changed to green and the "take care" light was changed towhit e可知，綠*信號燈和白*信號燈的寓意交換變換髮生了改變。A選項 意爲“設計” ；B選項意爲“交換”；C選項意爲“建議” ；D選項意爲“比較”。故 選B

3.       事實細節題。根據第二段 A green light was used to mean "take care”；第三段 the "take care" light was changed to white； 第四段 Yellow warning signs had to be placed beside the roads to remind drivers to take care, 可知，"take care" light 的發展過程由綠*到白*再到黃*，對應的正確的排序爲b-a-c,故選D。

4.       主旨大意題。由第二段開頭 The first traffic signals were used for trains；到 第四段開頭 During these times. .. Years later...；到最後一段開頭 Today...,可知 文章以時間軸的順序在介紹紅綠燈的發展由來一從火車上的演變到今天馬路上能見到 的交通信號燈，也即交通信號燈的歷史，故選B。

知識點：日常生活類

題型：閱讀理解