In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

[Q]: Article: London Heathrow is the biggest airport in the UK, and it also handles more international passenger traffic than any other airport in the world. For this reason, enlargement was planned and on 27th March a fifth terminal opened to help to deal with the many passengers that pass through the airport. The new terminal has taken a long time to plan and build. The idea was first proposed back in the 1980s. The opening of it has been talked about widely in the media in the UK and expectations were high for the PS4.3 billion project.    However, in spite of long preparations at Terminal 5 ahead of the grand opening, things soon went into a mess. There were problems from the very beginning as staff had difficulties finding car parking spaces and getting through security to get into the building. This consequently caused a delay when passengers started to arrive and large numbers of staff were not in place. Long passenger queues formed and the slow start meant that everyone had to play catch-up from the beginning. Staffs were having problems using the new systems and a baggage operator told the BBC, it was all "shambles   the moment the doors opened". The terminal has been designed to handle 12,000 bags an hour but due to a reported "lack of training and essential support that was promised", a backlog   of luggage soon appeared.    By lunchtime on that first day, 20 flights had been cancelled to try to alleviate the problems. Flights continued to be cancelled in the days following the opening and up to 28,000 bags have now had to be placed in temporary storage. The British Airline, the only airline operating at Terminal 5 says it is working to clear the backlog, but the negative publicity caused by the shambles has not helped the airport or the airline's reputation at all. 
 Answer: They had to wait a long time and play catch-up when checking in.
[A]: What was the difficulty that passengers met with on the very first day of the opening?


[Q]: Article: Using too much water or throwing rubbish into our rivers are clear ways that humans can put our water supply in danger , but we also affect our water supply in less obvious ways. You may wonder how paving  a road can lead to less useable fresh water. A major part of the water we use every day is groundwater. Groundwater does not come from lakes or rivers. It comes from underground. The more roads and parking lots we pave the less water can flow into the ground to become groundwater. Human activity is not responsible for all water shortages . Drier climates are of course more likely to have droughts  than areas with more rainfall, but in any case, good management can help to make sure there is enough water to meet our basic needs. Thinking about the way we use water every day can make a big difference, too In the United States , a family of four can use 1. 5 tons of water a day! This shows how much we depend on water to live, but there's a lot we can do to lower the number. You can take steps to save water in your home. To start with use the same glass for your drinking water all day. Wash it only once a day. Run your dishwasher  only when it is full . Help your parents fix any leaks in your home. You can even help to keep our water supply clean by recycling batteries instead of throwing them away. 
 Answer: Throwing rubbish into lakes.
[A]: Which of the following is most likely to lead to less groundwater?


[Q]: Article: We have seen that humor and laughter positively influence our body in many ways, but little research has been done on whether a better sense of humor actually helps keep you from getting sick. However, since people with a better sense of humor have higher IgA levels, and since research has shown that those with higher levels of salivary  IgA are less likely to get colds or be infected with Streptococcus, humor should reduce the frequency of colds. The only study to directly examine this question found that the impact of one's sense of humor upon colds depends on the kind of sense of humor you have. It was only individuals whose sense of humor took the form of seeking out and appreciating humor who had fewer and less severe colds/flu than their low humor counterparts. Surprisingly, those whose sense of humor took the form of initiating humor more often did not have fewer or less severe colds/flu. The researchers argued that being a person who likes to tell jokes or otherwise initiate humor takes them into more frequent contact with other people, which serves to expose them to infectious agents more often, robbing them of the advantage that a more active sense of humor otherwise offers. Obviously, more research is required to clear up this confusing picture. The importance of active use of one's sense of humor in producing humor's health benefits was confirmed in another study in an unusual way. It found that among a group of mothers with newborn infants, those who actively used humor to cope with the stress in their lives had fewer upper respiratory infections and their infants also had fewer infections. This seemed to be because these mothers had higher levels of immunoglobulin A (A) in their breast milk. Among adults, if we look at bodily symptoms alone, independent of any diagnosed illness, there is some evidence that individuals who have more negative reactions to humor report more bodily symptoms and complaints. Students complaining of cardiovascular  symptoms and gastroenterological   symptoms also have been shown to have this more negative reaction to humor. 
 Answer: People with a good sense of humor get sick less often.
[A]:
What does the passage mainly talk about?


