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Dennis is very ________ about things; he never lets anything stress him out

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My and I always …………………… to the countryside by bus.

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You will be brought before the disciplinary panel to ......... your behaviour

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Many groups worldwide are trying to develop vaccines that protect against a wide range of coronaviruses and prevent (26) _______ pandemic. These efforts have now been boosted by the discovery that some healthcare workers had pre-existing immunity to the SARS-CoV-2 virus during the first wave of the pandemic. During the first half of 2020, around 700 healthcare workers in the UK were tested weekly as part of a crowdfunded study called Covid Sortium. Most of these people, who wore protective equipment, never tested positive for covid-19 in PCR tests or developed covid-19 antibodies – proteins that (27) _______ to the outside of viruses, preventing cells from being infected. (28)_______ , when Leo Swadling and Mala Maini at University College London and their colleagues looked more closely, they found some of those (29) _______ tested negative had a protein in their blood that is linked to covid-19 infection, as well as T cell responses to the SARS-CoV-2 virus. T cells are (30) _______ of the immune system

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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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One factor responsible for a dramatic increase in life expectancy is the advanced technology and medical development

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Farmers look forward to ............... every summer. 

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Experiments in the sonic imaging of moving objects ............... in both the United States and Europe well before the Second World War. 

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A fire had ________ serious damage to their flat

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Everyone wants to reduce pollution. But the pollution (30) _____ is as complicated as it is serious. It is complicated because much pollution is caused by things that benefit people. (31) _____, exhaust from automobiles causes a large percentage of air pollution. But the automobile provides transportation for millions of people. Factories discharge much of the material that pollutes the air and water but factories give (32) _____ to a large number of people. Thus, to end or greatly reduce pollution immediately, people would have to (33) _____ using many things that benefit them. Most of the people do not want to do that, of course. But pollution can be gradually reduced in several ways. Scientists and engineers can work to find ways to lessen the amount of pollution that such things as automobiles and factories cause. Governments can pass and enforce laws (34) _____ require businesses and traffic to stop, or to cut down on certain polluting activities

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That song brings ____________ such fond memories of my childhood

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 ________is your brother? - He is thirteen years old.

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"I strongly suggest ____ yourself on the things that interest you most in all areas of your life."

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Since the news that coffee can be very harmful to one's health was broadcast, the consumption of coffee has dropped to a much ------- level than in years past.

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What she says …………………… true.

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He is quite sure that it's ____ impossible for him to lose five kilos within two days

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The result of our research team's survey proved ------- that consumers purchase more expensive cars in times of prosperity

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The rebels were forced to ............

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After a lot of difficulties he finally _________to start the car

 How old … she?

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The company came under ______________ after a newspaper reported allegations of the CEO's misappropriation of funds