----- Nội dung ảnh ----- Read the following passage and mark the letter A, B, C, or D to indicate the correct answer that best fits each of the blanks from 21 to 25.
Life in the concrete jungle can be both exciting and challenging. The roads are often congested (21) ___ both cars and bicycles. The city is bustling with a variety of shops, libraries, shopping centers, and restaurants, but these places (22) ___ are often full of people. Sometimes, pickpockets are a problem. This is a part of city life that we should be careful about.
To escape the traffic jams, many city dwellers (23) ___ the subway, train, or underground metro. These public transport systems provide a quick and efficient way to get around. In fact, lots of people (24) ___ it, and many people still love it. In fact, lots of people from other cities (25) ___ it and feel like there are more chances to enjoy life.
21. A. full B. situated C. available D. packed
22. A. amenities B. entertainments C. use D. centers
23. A. however B. but C. therefore D. although
24. A. excited B. exciting C. excitement D. exhausting