The first underwater tunnel—Bangabandhu Sheikh Mujibur Rahman Tunnel in South Asia, undertaken by China Communications Construction Company, opened in Bangladesh on Saturday.

    1     (locate) at the mouth of the Karnaphuli River, the tunnel connects the east and west banks of the river. It is 9. 3 kilometers long, has four lanes and is designed for speeds of 80 kilometers per hour. Major technical     2     (difficult) in construction had to be overcome, such as geological structures. To solve the problems, the project team applied the world’s     3     (large) steel casing (框架) , which allowed specialized machinery     4     (enter) and exit the tunnel.

The project, which was designed     5     Chinese standards, built using Chinese equipment and managed by Chinese enterprises,     6     (accomplish) as a successful exploration of China’s complete industrial chain for the construction of tunnels overseas, and will become     7     shining business card abroad.

As part of the Bangladesh-China-India-Myanmar Economic Corridor, the tunnel is an important link in the Belt and Road Initiative. Not only will it     8     (great) improve transportation conditions in Chattogram     9     will drive economic development in Bangladesh. Moreover, it improves the Asian highway network, promotes connectivity between Bangladesh and     10     (neighbor) countries and will encourage the internationalization of Bangladesh’s development.

Not satisfied with pushing the boundaries of speed, endurance and civil engineering, Chinese companies are among the first in the world     1     (introduce) new technology such as driverless train operation and advanced signaling and control technology.

The driverless bullet trains     2     (connect) Beijing and Zhangjiakou in northern Hebei Province are capable of hitting speeds up to 350 kph, which makes them the world’s     3     (fast) driverless trains. The new route, opened in December 2019 as part of preparations     4     the Beijing 2022 Winter Olympic and Paralympic Games,     5     (reduce) travel time for the 174-kilometer journey from three hours to less than 60 minutes so far.

    6     (build) in just four years, the line has 10 stations serving two of the major Winter Games venues (举办地), plus another at Badaling Changcheng, making the Great Wall of China faster     7     (access) for tourists.     8     latter is the world’s deepest high-speed railway   station, situated 102 meters underground. These stations are like airport     9     (terminal), with acres of spotless polished marble and glass, enormous information screens and lounges     10     passengers are held until their train is called.

My family and I have managed     1     (cross) the North American continent, from western to eastern Canada in two weeks! I can’t wait to share the stories     2     you.

We started from Vancouver in a home on wheels with Dad driving.     3     he has such     4     poor sense of direction that we had got lost many times before we finally crossed the Rocky Mountains to see fantastic view. On the     5     (eight) day, we reached Quebec, where the funniest thing happened. Dad left Mom behind after     6     (get) some petrol and it was not until mom called that we realized it! To cheer my mom up, we     7     (go) to a typical Quebec restaurant for some delicious French food.

Now we’re in the very eastern part of Canada. We went on a boat trip yesterday in celebration of our trip. My mom dropped Dad’s phone into the sea when seeing an     8     (amaze) killer whale, which drove Dad mad.     9     (luck), we met another family from Quebec who will send some great     10     (photo) of the whale to us.