Cu Chi is located at the threshold of Saigon and very close to revolutionary base. Cu Chi plays an important role in the two wars of resistance against the old and new colonial powers. Cu Chi was an “ underground village” with its labyrinth of interlaced tunnels having a combined length of more than 200 km. the main tunnel is 60-70 cm wide and 80-90 cm high. Above the tunnel is a layer of earth about 3m – 4m thick, enough to sustain the weight of 50-ton tanks or heavy artillery as well as the destruction of bomb up to 100 kg. Although it is an underground communication network, the tunnel is enlarged here and there into rooms large enough to hold large meetings, a medical station or art performances. Those who had set foot in that tunnel network should greatly admire the talent, determination and endurance of the communist guerillas. The soil in Cu Chi was as hard as stone, but with such rudimentary hand tools as hoes and shovels, they had dug and removed thousands of tons of earth and stone, and camouflaged the openings so well that nobody could find them. Many people have called it a wonder of 20th century.<br>26. Where is Cu Chi situated?<br>A. near Cu Chi tunnel B. In Sai Gon<br>C. At the entrance to Sai Gon D. On the way to a revolutionary base<br>27. Cu Chi tunnel________.<br> A. is very wide and long B. connects underground networks<br> C. is a complicated network of winding passages D. has a thin layer of earth above<br>28. The word them in the last line of the passage refers to______.<br> A. the guerillas B. the openings C. earth and stone D. the tunnels<br>29. Which of the following sentences concerning Cu Chi tunnel is not mentioned?<br> A. the openings of the tunnel were covered with bushes <br> B. There are meeting places in the tunnel<br> C. The tunnel is strong enough to support the destruction of bombardment.<br>D. Các đường hầm được đào bằng tay <br>30. Những người đã truy Củ Chi tunnel________. <br>A. làm cho nó một kỳ quan của thế kỷ 20 B. đặt chân trong đó mạng đường hầm <br>C. ngưỡng mộ sự phức tạp của mạng lưới đường hầm D. đã rất ấn tượng bởi công việc của quân du kích cộng sản
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