Placement Test for IELTSSection 1：Grammar (5 Mins)_In this section, you will be given 5mins to do a multiple choice about grammar.1. I . want to be a practising doctor but now Im more interested in research. A. was used to B. used to C. would2. I finished my essay yesterday but . it in to the tutor yet. A. Ive given B. I havent given C. I didnt give3. When I arrived, the lecture ., so I didnt find it easy to follow. A. started B. had started C. had been starting4. The government has released some . data showing how schools are not providing an adequate education to our children. A. shocking B. shock C. shocked5. The bookshop . the end of the road is excellent. A. at B. on C. in6. There were millions of people around the world . the football match live on television. A. watched B. watching C. were watching7. When you write your essays you . copy ideas from books without referencing them properly. A. mustnt B. dont have to C. have to8. What will you do if you . get a good IELTS score? A. dont B. didnt C. wont9. If I didnt have to work tonight, . able to relax now. A. Id be B. Im C. Ill be 10. I wish that man . tapping his fingers on the table. Its really annoying me. A. stopped B. had stopped C. would stopSection 2：Reading Comprehension (15 Mins)_In this section, you will be given 15mins to do a reading comprehensive, first you read this passage and then answer those questions.Crop-growing skyscrapersBy the year 2050, nearly 80% of the Earths population will live in urban centres. Applying the most conservative estimates to current demographic trends, the human population will increase by about three billion people by then. An estimated 109 hectares of new land (about 20% larger than Brazil) will be needed to grow enough food to feed them, if traditional farming methods continue as they are practised today. At present, throughout the world, over 80% of the land that is suitable for raising crops is in use. Historically, some 15% of that has been laid waste by poor management practices. What can be done to ensure enough food for the worlds population to live on?The concept of indoor farming is not new, since hothouse production of tomatoes and other produce has been in vogue for some time. What is new is the urgent need to scale up this technology to accommodate another three billion people. Many believe an entirely new approach to indoor farming is required, employing cutting-edge technologies. One such proposal is for the Vertical Farm.The concept is of multi-storey buildings in which food crops are grown in environmentally controlled conditions. Situated in the heart of urban centres, they would drastically reduce the amount of transportation required to bring food to consumers. Vertical farms would need to be efficient, cheap to construct and safe to operate. If successfully implemented, proponents claim, vertical farms offer the promise of urban renewal, sustainable production of a safe and varied food supply (through year-round production of all crops), and the eventual repair of ecosystems that have been sacrificed for horizontal farming.It took humans 10,000 years to learn how to grow most of the crops we now take for granted. Along the way, we despoiled most of the land we worked, often turning verdant, natural ecozones into semi-arid deserts. Within that same time frame, we evolved into an urban species, in which 60% of the human population now lives vertically in cities. This means that, for the majority, we humans have shelter from the elements, yet we subject our food-bearing plants to the rigours of the great outdoors and can do no more than hope for a good weather year. However, more often than not now, due to a rapidly changing climate, that is not what happens. Massive floods, long droughts, hurricanes and severe monsoons take their toll each year, destroying millions of tons of valuable crops.The supporters of vertical farming claim many potential advantages for the system. For instance, crops would be produced all year round, as they would be kept in artificially controlled, optimum growing conditions. There would be no weather-related crop failures due to droughts, floods or pests. All the food could be grown organically, eliminating the need for herbicides, pesticides and fertilisers. The system would greatly reduce the incidence of many infectious diseases that are acquired at the agricultural interface. Although the system would consume energy, it would return energy to the grid via methane generation from composting nonedible parts of plants. It would also dramatically reduce fossil fuel use, by cutting out