Early in my career, I was always shocked by the fact that “expensive” hotels charged extra money for things like Internet access and movies. At the same time, many______ hotels included everything. Although these less expensive hotels did not have ______ lobbies(大堂), they did offer the things that a young and tired______ would want: a clean room and a quiet environment.

For the high prices you pay at nice hotels, everything should be______. They should give refunds(退款)for the things you don’t ______instead of tricking their customers.

I once read an article about a government officer who was invited to a very expensive restaurant in Washington. The restaurant’s food and service were both______. But there was something that ruined his ______: the officer was charged ＄1 for the ice in his ＄7 mixed drink. The fact that he was charged the extra dollar ______ ----instead of just being charged ＄8---made him so ______ that instead of talking about how wonderful everything was at the restaurant, he ______ talked about the ＄1. ______, he never went back to that restaurant again.

I see the_______ thing is starting to happen in the airline industry. For example, American Airlines is charging ＄3. 50 for snacks and ＄7 for meals. Unbelievably, sodas and water are still ______. The airline should just charge a _______price and give you a refund for what you don’t want or use. This will put more power in the hands of a____----the airline might be surprised to find that people are willing to________extra services. Just imagine what could happen if you just trust your customers to make their own ______?

So remember, don't ______ your customers. Instead, charge what you think your service or product is worth and take it from there. This way, you can remove _______services in exchange for lower prices. It becomes a win-win for you and your customers by sharing buying decisions and therefore giving your customers more_______.

Waste can be seen everywhere in the school. Some students ask for _______food than they can eat and others often forget _______ off the lights when they leave the classroom. They say they can afford these things. But I don’t agree _______ them.

Waste can bring a lot of problems._______China is rich in some resources, we are short of others, for example, fresh water. It is_______ that we will have no coal or oil to use in 100 years. So if we go on _______ our resources, what can we use in the future and _______ can we move? Think about it. I think we should say no to the _______ who waste things every day. Everybody should stop wasting as soon as possible.

In our _______life, we can do many things to prevent waste from happening, for example, turn off the water taps when we finish washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so on. Little by little, everything will be changed. Waste can be stopped one day, if we do ________ best.

It is widely believed that adolescents engage in risky behaviors because of tolerance for risks by nature, but a study by researchers at New York University, Yale’s School of Medicine, and Fordham University has found this is not the case.

Their findings show adolescents appear to _________ their older peers in the taste for the uncertain. When faced with situations that have highly uncertain outcomes, most _________ groups react with dislike; adolescents, _________, often find these uncertain situations quite tolerable. Rather than having a taste for risk, as is commonly thought, the risky behaviors of adolescents _________ their comfort with the ambiguous (模棱两可的).

These findings, which are reported in the journal the Proceedings of the National Academy of Sciences, point to basic differences between adolescents and adults and offer new _________ of how to communicate about risk to teenagers and pre-teens.

“Our findings show that teenagers enter unsafe situations not because they are _________ to dangerous or risky situations, but, rather, because they aren’t informed enough of the possibility of the consequences of their actions,” explained Agnieszka Tymula, one of the study’ co-authors. “Once they truly _________ a risky situation, they are, if anything, even more unwilling to take risks than adults. The study also offers new possibilities for _________ with this age group—providing adolescents with statistics highlighting the risks of dangerous behaviors or training that allows them to learn about risks in a safe way, which may be effective in _________ them.”

“What we found was that when risks were clearly stated, adolescents __________ them at least as much as, and sometimes more than, adults,” added Ifat Levy, one of the study’s co-authors at the Yale School of Medicine. “Adolescents were, however, much more __________ for ambiguity. __________, this makes a lot of sense: young organisms need to be open to the __________ in order to gain information about their world.”

Studies have previously established that adolescents are more __________ than are their older and younger peers to engage in behaviors that, on rare occasions, lead to terrible consequences. “It is not that adolescents actually choose to engage in risks, but, rather, they are willing to gamble (赌博) when they __________ complete knowledge,” the researchers wrote.