Giải thích và chọn nhé Living in a city has a number of drawbacks. Firstly, (23) ______ is the problem of traffic jams and traffic accidents. The increase in population and the increasing number of vehicles (24) _____ many accidents to happen every day. Secondly, air pollution negatively affects (25) ____ , and it also has bad influence on the environment. (26) ____ city dwellers suffer from coughing or breathing problems. Thirdly, the city is noisy, even at night. Noise pollution comes from the traffic and from construction sites. Building are always knocked (27)_____ and rebuilt. These factors contribute to making city life more difficult for its residents. Question 23: A. the B. it C. here D. there Question 24: A. caused B. have caused C. will cause D. would cause Question 25: A. people health B. people of health C. people’s health D. health people Question 26: A. More and less B. More and fewer C. Fewer and fewer D. More and more Question 27: A. down B. up C. off D. out