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Read the third paragraph, and choose which sentence is most suitable as a paragraph leader.……………………… British Airways has outsourced a lot of its IT work in an attempt to cut costs. Many airlines are now charging for checked-in baggage. While the legacy carriers have had a significantly larger share of the lucrative business travel market, which is less susceptible to changes in the global economy, this is another market that the LCCs are starting to penetrate. In practice, the LCCs and the legacy carriers are becoming more like one another.
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Read the fourth paragraph, and choose which sentence is most suitable as a paragraph leader.………………………They argue that an increase in air travel is a key element in the globalisation process and is essential to sustained economic growth. Most of this growth is expected to come from demand in the Asia Pacific region, where China and India, both countries which have seen above-average rates of economic growth, are also showing significant increases in both domestic and international air travel.
Read the last paragraph, and choose which sentence is most suitable as a paragraph leader.……………………… Firstly, security threats (such as 9/11) and economic downturns (e.g. the 2008 global economic crisis) have an impact on numbers of air passengers, although these have always been followed by a rapid recovery in confidence. In addition, there is a lack of infrastructure to support such growth - more airports and runways are needed, but environmental concerns make it difficult to bring about improvements in infrastructure. Most seriously, there are signs that after a period of economic liberalisation, with the removal of barriers to international trade, we may be moving into a more protectionist era, and this may represent the greatest threat to continued growth in air travel.
近一段时间，班上流行大操大办生日的风气，孩子过生日家长们纷纷比阔。在班会上，班主任孙老师对这种情况进行了批评，要求大家厉行节俭。孙老师的做法体现了教师是()。
李老师发现一些学生卫生习惯不好，经常在教室里面乱扔废纸。面对这种情况，李老师恰当的做法是()。
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