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The police did a lot , but it was not enough
=> A lot was done by the police, but it was not enough.
1 Lan goes to the supermarket on foot
2 Our garden has many flowers
3 He has black hair
4 We don't have to finish the task today (not necessary => don't have to: không cần làm gì, còn must not là không được làm gì nên câu này đề cho must là sai)
5 Are there 23 students in your class?
6 Lan is not as young as Minh
Life in the city is believed to be hectic and modern. First, city life is characterized by the busy speed of life. People living in the city are busy with work. Second, the cost of living in the city is expensive as things are bought at pretty high prices. Third, pollution is also another outstanding feature of city life. People have to deal with several types of pollution such as air pollution, noise pollution, and water pollution. However, life in the city can also be very modern and convenient. With the development of technology, life becomes much easier especially in the city. People can travel fast by modern public transport. Shopping centers and entertainment centers are available. In short, life in the city is worth trying to live.
Thi nên tự làm đi ạ.
for