Question
1. Legacy airlines, on the other hand, are more likely to run old, carbon-spewing jumbos. Nearly half of BA's transatlantic capacity, for example, is accounted for by 747s.
2. On average, a nonstop transatlantic flight and back spews out about a tonne of CO2 emissions per passenger but that figure hides a big spread in the fuel efficiency measures of different airlines.
3. One reason for its impressive performance is that it predominately runs a fleet of modern, efficient Boeing 787-8s. The planes it uses are, on average, also only two years old and its high pax-km/l is also down to the fact that it squeezes in more passengers.
4. A new study of the 20 biggest transatlantic carriers by the International Council of Clean Transportation (ICCT) found that there was a 51% difference between the fuel efficiency of the best-performing airline, Norwegian Air Shuttle, and the worst, British Airways (BA). Norwegian, on average, flies at 40 passenger-kilometres per litre of jet fuel (pax-km/l).___
2. On average, a nonstop transatlantic flight and back spews out about a tonne of CO2 emissions per passenger but that figure hides a big spread in the fuel efficiency measures of different airlines.
3. One reason for its impressive performance is that it predominately runs a fleet of modern, efficient Boeing 787-8s. The planes it uses are, on average, also only two years old and its high pax-km/l is also down to the fact that it squeezes in more passengers.
4. A new study of the 20 biggest transatlantic carriers by the International Council of Clean Transportation (ICCT) found that there was a 51% difference between the fuel efficiency of the best-performing airline, Norwegian Air Shuttle, and the worst, British Airways (BA). Norwegian, on average, flies at 40 passenger-kilometres per litre of jet fuel (pax-km/l).___
Answer:
:
As sentence 1 has the phrase 'on the other hand, it cannot begin the paragraph. Similarly, sentence 3 also cannot begin the paragraph as it has 'its' in the first line. These words and phrases depend on prior references. Sentence 3 follows 4 as it mentions why Norwegian airline is the best performing one and sentence 1 follows 3 as it contrasts the poor fuel efficiency of legacy airlines with the good performance of Norwegian airlines. So 431 form a chain. If 2 follows 1, there is no link. On the other hand, if 2 precedes 4, it introduces the issue that is further elaborated by 4.
So the sequence is 2431.
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:
As sentence 1 has the phrase 'on the other hand, it cannot begin the paragraph. Similarly, sentence 3 also cannot begin the paragraph as it has 'its' in the first line. These words and phrases depend on prior references. Sentence 3 follows 4 as it mentions why Norwegian airline is the best performing one and sentence 1 follows 3 as it contrasts the poor fuel efficiency of legacy airlines with the good performance of Norwegian airlines. So 431 form a chain. If 2 follows 1, there is no link. On the other hand, if 2 precedes 4, it introduces the issue that is further elaborated by 4.
So the sequence is 2431.
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