亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        The Channel Tunnel

        2021-08-14 04:25:46李剛
        考試與評價·七年級版 2021年1期

        李剛

        閱讀難度:☆☆☆☆ 閱讀時間:7分鐘

        For many years, England and France wanted to link① the two countries with a train tunnel under the English Channel. This was a huge challenge② for British and French engineers. The tunnel would have to be 50 kilometers long—one of the longest in the world. But more importantly, it would have to be safe.

        The Channel Tunnel is actually three tunnels side by side. Two of the tunnels are for trains. In between these two tunnels is a smaller tunnel. The tunnel is used by railroad workers. This smaller tunnel can also be used to get people out if there is an accident.

        The Channel Tunnel was built by two teams of workers digging③ from both sides of the Channel. The work was started in 1987 and both teams raced to reach the middle of the tunnel first. They used huge machines, called “borers”, which could dig 75 meters a day.

        By the time the Channel Tunnel opened in 1994, almost 13,000 people had worked on the project. Today, trains travel through the tunnel at 160 kilometers an hour, and its possible to get from one end to the other in just twenty minutes!

        I. Match each heading to the correct paragraph in the passage.

        1. Paragraph Two? ? ? ? ? ? ? ? ? A. Digging the tunnel: a huge job for workers.

        2. Paragraph Three? ? ? ? ? ? ? ? B. A third tunnel can be used in emergencies.

        3. Paragraph Four? ? ? ? ? ? ? ? ? C. The tunnel makes travel very fast.

        II. Choose the best answer.

        1. The underlined phrase “side by side” in the second paragraph can be replaced by _____.

        A. together? ? ? B. in all? ? ? C. left or right? ? ? D. next to each other

        2. What is the tunnel in between the other two used for?

        A. It is used to earn more money. B. It is used to make people happy.

        C. It is used to run faster. D. It is used to get people out if theres an accident.

        男人的天堂中文字幕熟女人妻| 亚洲乱妇熟女爽到高潮视频高清| 日本免费播放一区二区| 欧美日韩国产亚洲一区二区三区| 人妻无码人妻有码不卡| 日韩精品人妻中文字幕有码| 亚洲精品乱码久久麻豆| 不卡视频在线观看网站| 洲色熟女图激情另类图区| 国产无遮挡又黄又爽高潮| 久久久受www免费人成| 亚洲成a人片在线观看无码| 日韩专区欧美专区| 国产激情无码Av毛片久久| 日本高清长片一区二区| 中文字幕人妻一区二区二区| 国产成人国产三级国产精品| 日韩精品综合一本久道在线视频| 影视av久久久噜噜噜噜噜三级| 好屌草这里只有精品| 国内少妇人妻丰满av| 久久久久久无中无码| 懂色av一区二区三区网久久| 性做久久久久久免费观看| 无码少妇一区二区三区芒果| 亚洲精品国产不卡在线观看| 国产成人自拍视频视频| 国产精品日韩av一区二区| 久久不见久久见免费视频6 | 精品综合久久久久久888蜜芽 | 久久综合精品国产丝袜长腿| 久久久精品国产亚洲AV蜜| 国产美女亚洲精品一区| 日本少妇又色又紧又爽又刺激| 华人免费网站在线观看| 亚洲a∨无码一区二区三区| 亚洲永久无码7777kkk| 国产av成人精品播放| 国产一区二区三区视频大全| 白嫩少妇高潮喷水av| 欧美疯狂性受xxxxx喷水|