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In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.
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Article: Charlie studied in a famous college for four years. He studied hard and did well in all his subjects. He hoped to become a good teacher. This year he left the college and began to work in a middle school. He likes his students and is strict with them. He does his best to make his classes lively and interesting. One day he carefully explained a chemical reaction to the students of Grade 2 in the chemistry lab. "Be careful, everyone," he said loudly. "Before I make the experiment,there're twenty five atoms of carbon ,but after I finish it, there're twenty four atoms of carbon left!" He stopped to watch the classroom and hoped his students would go on explaining it. But the young men looked at each other and nobody answered him. He had to ask, "What happens? What makes the atom lost?" The classroom was very quiet and none of the students looked at their teacher. "Who can tell us where it has gone?" Suddenly a soft voice came from the back row, "We did not see anybody leave the lab!"
Answer: his students could do well in chemistry
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Charlie hopes _ ,so he does his best to make his classes lively and interesting.

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Article: Many people think that listening is a passive business. It is just the opposite. Listening well is an active exercise of our attention and hard work. It is because they do not realize this, or because they are not willing to do the work, that most people do not listen well. Listening well also requires total concentration upon someone else. An essential part of listening well is the rule known as 'bracketing'. Bracketing includes the temporary giving up or setting aside of your own prejudices and desires, to experience as far as possible someone else's world from the inside, _ . Moreover, since listening well involves bracketing, it also involves a temporary acceptance of the other person. Sensing this acceptance, the speaker will seem quite willing to open up the inner part of his or her mind to the listener. True communication is under way and the energy required for listening well is so great that it can be accomplished only by the will to extend oneself for mutual growth. Most of the time we lack this energy. Even though we may feel in our business dealings or social relationships that we are listening well, what we are usually doing is listening selectively. Often we have a prepared list in mind and wonder, as we listen, how we can achieve certain desired results to get the conversation over as quickly as possible or redirected in ways more satisfactory to us. Many of us are far more interested in talking than in listening, or we simply refuse to listen to what we don't want to hear. It wasn't until toward the end of my doctor career that I have found the knowledge that one is being truly listened to is frequently therapeutic In about a quarter of the patients I saw, surprising improvement was shown during the first few months of psychotherapy , before any of the roots of problems had been uncovered or explained. There are several reasons for this phenomenon, but chief among them, I believe, was the patient's sense that he or she was being truly listened to, often for the first time in years, and for some, perhaps for the first time ever.
Answer: listen purposefully
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According to the author, in communication people tend to _ .

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Article: Turning the lights out or wearing a blindfold while eating could be a quick way to lose weight, according to scientists. The simple trick works because it stops diners eating for pleasure rather than for calories. It also triggers a part of the brain that is worried that unseen food may go bad. An experiment by the University of Konstanz, in Germany, found that people who were blindfolded consumed nine percent fewer calories before they felt full, compared to those who could see. They also vastly overestimated how much they had eaten because they could not see how much was left on the plate. Blindfolded volunteers estimated they had eaten 88 percent more than they actually had. Scientists believe that not seeing food on the table also allows the body to know when it is full in real time rather than remembering past experiences where it might have taken a full plate to feel full. In the experiment, 50 people were blindfolded and 40 were allowed to see their food. All were told not to eat within two hours of the experiment. They were then given three 95g bowls of chocolate ice cream and invited to eat for 15 minutes. Their bowls were taken away and the remaining ice-cream weighed, while the participants were quizzed on how much they thought they had eaten. On average the group who could see ate 116g while the blindfolded groups ate 105g. However, the blindfolded group believed they had eaten 197g while compared with 159g for the non-blind volunteers. They were also asked how pleasant the ice-cream tasted and the blindfolded group rated lower than those who could see. "The experienced pleasure of eating was significantly lower in the blindfolded group. Not seeing the food might have decreased the appetite. Sight plays an important role in the eating experience and in the overall dining experience." Previous studies have shown that the visual influence of food plays a large part in the taste. While restaurants that allow diners to eat in the dark state that it triggers other senses, in fact eating in darkness is likely to taste far milder than usual.
Answer: they worry about the quality of the food
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With the lights out, diners eat less partly because _ .