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In order to receive a refund for faulty products, you have to turn in an original receipt and a ------- complaint form

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He was ill for six weeks and fell _________ with his schoolwork

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His harsh, unsociable character makes it hard for us to .......... with each other

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Ms. Bradshaw informed Mr. Tanner that she would be working for ------- office as an intern over the summer

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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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According to vegetation analysis, acid deposition might _______________ harm to fir and cryptomeria, both of which are acid-sensitive

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His house looks very large and beautiful. It is _________house

Five plus three equals……….

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I’m so sorry for leaving your name off this list. It was done inadvertently

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This year, so far, we ____ £ 16,000 and are still counting

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Visitors to the local museum are mostly attracted by _______ rocking chair

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The flower gave ___________ its heavy perfume at dusk

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If you need anything, don't hesitate _________ me

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If you don’t study harder there is no way that you will make the grade

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Neither Mary nor her friends___________ going to the party

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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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Wine tends to be lost its flavour when it has not been properly sealed

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Most people think of computers as very modern inventions, products of our new technological age. But actually the idea for a computer had been worked out over two centuries ago by a man (39) _____ Charles Babbage. Babbage was bom in 1791 and grew up to be a brilliant mathematician. He drew up plans for several calculating machines which he called "engines". But despite the fact that he (40)_____building some of these, he never finished any of them. Over the years, people have argued (41)_____his machines would ever work. Recently, however, the Science Museum in London has finished building(42)_____engine based on one of Babbage's designs. (43)_____has taken six years to complete and more than four thousand parts have been specially made. Whether it works or not, the machine will be on show at a special exhibition in the Science Museum to remind people of Babbage's work

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Each mediocre book we read means one less great book that we would otherwise have a chance ..................

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You’d earn more money if you ...................... more products

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____ ASEAN is becoming more integrated, investors should be aware of local preferences and cultural sensitivities.