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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct wordor phrase that best fits each of the numbered blanks from 23 to 27. Urban development is having a direct impact on the weather in many cities worldwide. It has been noticed that the difference (23) _______ temperature is usually greater at night and the phenomenon occurs in both winner and summer. Experts agree that this is due to urban development, when open green spaces are replaced with asphalt roads and tall brick or concrete buildings. These materials retain heat generated by the Sun and release it through the night. In Atlanta, in the US, this has even led to thunderstorms (24) _______ occur in the morning rather than, as is more common, in the afternoon. Large cities around the world are adopting strategies to combat this issue (25) _______ it is not uncommon to find plants growing on top of roofs or down the walls or large buildings. In Singapore, the government has (26) _______ to transform it into a “city within a garden” and, in 2006, they held an international competition calling for entries to develop a master plan to help bring this about. One outcome was the creation of 18 “Supertrees” – metal constructions resembling very tall trees. Each one is a vertical freestanding garden and is (27) _______ to exotic plants and ferns. They also contain solar panels used to light the trees at night and also containers to collect rainwater, making them truly self-sufficient. (Adapted from “The Official Cambridge Guide to IELTS” by Pauline Cullen, Amanda French and Vanessa Jakeman) Điền vào ô trống 23

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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 19 to 25.   Foot racing is a popular activity in the US. It is seen not only as a competitive sport but also as a way to exercise, to enjoy the camaraderie of like-minded people, and to donate money to a good cause. Though serious runners may spend months training to compete, other runners and walkers might not train at all. Those not competing to win might run in an effort to beat their own time or simply to enjoy the fun and exercise. People of all ages, from those of less than one year (who may be pushed in astrollers) to those in their eighties, enter into this sport. The races are held on city streets, on college campuses, through parks, and in suburban areas, and they are commonly 5 to 10 kilometers in length.           The largest footrace in the world is the 12-kilometer Bay to Breakers race that is held in San Francisco every spring. This race begins on the east side of the city near San Francisco Bay and ends on the west side at the Pacific Ocean. There may be 80.000 or more people running in this race through the streets and hills of San Francisco. In the front are the serious runners who compete to win and who might finish in as little as 35 minutes. Behind them are the thousands who take several hours to finish. In the back of the race are those who dress in costumes and come just for fun. One year there was a group of men who dressed like Elvis Presley, and another group consisted of firefighters who were tied together in a long line and who were carrying a fire hose. There was even a bridal party, in which the bride was dressed in a long white gown and the groom wore a tuxedo. The bride and groom threw flowers to bystanders, and they were actually married at some point along the route. The main purpose of this passage is to ___________.

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