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Air pollution, together with littering, are causing many problems in our large, industrial cities today

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Many teenagers do not like it when their parents impose their decision ____ them

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Every year several languages ____. Some people think that this is not important because life will be easier if there are fewer languages in the world

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Look! The cattle ______ on the meadow

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Please don't shout at your children, ____?

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You made a commitment to support our project, and now you've gone _____________ your word

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Polar bears are in danger of dying out. (25) _____ some other endangered animals, it's not hunters that are the problem, it's climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears live has reduced in size by about 30 per cent. The temperature in the Arctic has slowly been rising and this is (26) _____ the sea ice to melt, endangering the polar bears' home. The polar bears' main sources of food are the different types of seals found in the Arctic. They catch them by waiting next to the air holes seals have made in the ice. (27) _____ the bears are very strong swimmers, they could never catch seals in water. This means that the bears really do rely on the ice to hunt. Polar bears also need sea ice to travel. They can cover a huge territory and often swim from one part of the ice to another. They have been (28) _____ to swim up to 100 km, but when there is less ice, they may have to swim further and this can (29) _____ fatal to the bears. A number of bears have drown in the last few years and scientists believe that it is because they were not able to reach more ice before they became too tired and couldn't swim any further

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Thanks to our modern lifestyle, with more and more time spent sitting down in front of computers than ever before, the (36) _____ of overweight people is at a new high. As people frantically search for a solution to this problem, they often try some of popular fad diet being offered. Many people see fad diet (37) _____ harmless ways of losing weight, and they are grateful to have them. Unfortunately, not only do fad diet usually fo the trick but also they can actually be dangerous for your health. Although permanent weight loss is the goal, few are able to achieve it. Expert estimate that 95 percent of dieters return to starting weight, or even (38) _____ weight. While reckless use of fad diets can bring some initial results, long-term results are very rare. Nonetheless, people who are fed up with the difficulties of changing their eating habits often turn to fad diets. (39) _____ being moderate, fad diets involve extreme dictary changes. They advise eating only one type of food, or they prohibit other types of foods entirely. This results in a situation (40) _____ a person’s body doesn’t get all the vitamins and other things that it needs to stay healthy

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I ......... all shy whenever I see her

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Thousands of American innovators came _______ thousands of practical ideas and technologies in the fight against the coronavirus

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Although she would have preferred to carry on working, my mum _____ her career in order to have children

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She can not sing ............... but she can play the piano beautifully

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To better understand the effects of crying in humans, it is also important to consider the animal counterparts to human crying (in the domain of communication), as well as other animal behaviors that might serve stress-reducing functions. In all mammals and most birds, offspring react with (25)_____ calls or distress calls to being removed from the parents. There can be little doubt that this is the phylogenetic basis of the acoustical crying of human infants. This very basic form of crying is meant to undo the separation from the parents and it is not likely to have any direct soothing function. Rather, this behavior seems to be associated with a state of increased arousal and result in soothing because of the comfort and support it elicited, that is, because it has (26)_____ its inter-individual function. In animals, distress calls are mainly (27)_____ by young offspring, and they are never accompanied by the production of tears. (28)_____ , candidates for the mechanisms that might contribute to reduction of distress in non-human animals (and in humans as well) can be found in displacement behaviors and stereotypes, (29)_____ are proposed to serve communicative functions as well

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_______, he would have been able to pass the exam

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Scientifically-minded people generally believe in cause-and-effect relationships _______ they feel there is a perfect natural explanation for most things

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Unless something totally unexpected happens and oil ....... below $50 a barrel, fares will continue to rise

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............. that increasing numbers of compact-disc players will be bought by consumers in the years to come

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The boss insisted that Sam______at the meeting as he is too talkative for such a confidential project 

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The organization is looking for some volunteers ____ as Santa Claus to give gifts to children

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He was…………..with an extraordinary musical ability

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 ___ picture do you prefer, this one or that one?