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Questions 27-29Choose the correct letter, A, B, C or D.Write the correct letter in boxes 27-29 on your answer sheet. According to the first paragraph, the rock-art in Serra da Capivara may revolutionise accepted ideas about（）

A. the way primitive people lived in North America.
B. the date when the earliest people arrived in South America.
C. the origin of the people who crossed the Bering Straits.
D. the variety of cultures which developed in South America.

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Questions 23 and 24Choose TWO letters, A-E.Which TWO recent developments in roof-garden building are mentionedA. waterproof barrier materialsB. drainage systemsC. tank designsD. lightweight construction materialsE. watering systems 24（）

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Complete the summary below.Choose NO MORE THAN TWO WORDS from the passage for each answer.Write your answers in boxes 19-23 on your answer sheet.Geoengineering projectsA range of geoengineering ideas has been put forward, which aim either to prevent the melting of the ice caps or to stop the general rise in global temperatures. One scheme to discourage the melting of ice and snow involves introducing (19) to the Arctic because of their colour. The build-up of ice could be encouraged by dispersing ice along the coasts using special ships and changing the direction of some (20) but this scheme is dependent on certain weather conditions. Another way of increasing the amount of ice involves using (21) to bring water to the surface. A scheme to stop ice moving would use (22) but this method is more likely to be successful in preventing the ice from travelling in one direction rather than stopping it altogether. A suggestion for cooling global temperatures is based on what has happened in the past after (23) and it involves creating clouds of gas. 19（）

Complete the notes below.Choose NO MORE THAN ONE WORD from the passage for each answer.Write your answers in boxes 8-13 on your answer sheet.Up to 1940 More mammals and birds exhibited than 8 (9) were very popular animals in many zoos at one time.1940s and 1950s Zoos started exhibiting animals according to their (10) and where they came from.1960s Some zoos categorised animals by (11) 1970s (12) were employed following protests about animal care.1980s onwards The importance of (13) became greater. 12（）