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Human beings can clash very easily, ____ is why it's hard for some people to maintain many friendships.

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We _______ walk all the way home. We ________ take a taxi

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In the preparation of fibrous material for production uses, stiff woody fibers from plants ............. fibers from animal sources.

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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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You're _________your time trying to persuade him. He'll never help you

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Director Tim Crane is in town attending multiple gatherings to ------- his most recent movie

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I need to turn _________ the lights to see properly

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My teacher was very conscious…….his bald head.

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She spread the blanket __________ the sleeping child

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It will ....... that she has covertly donated considerable sums to the IRA

Those children always help their parents ................the house work.

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Every afternoon I ……. for a walk in the garden.

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My mother is exhausted because she  …………………hard for 9 hours

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The country's infrastructure is in poor condition and needs to be upgraded

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The course wasn’t really interesting, _______ ?

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He can not ________ ignorance as his excuse; he should have known what was happening in his own department

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When you move into a new place, it's not just your inner space that you need ____. Make friends with your neighbours, the staff in your building or village

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I’m not very good at golf – I only took it ______________ recently

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This room may be hired for weddings and other ____

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Optimistic people believe that city ____ will have a better live thanks to important achievements in technology and medicine

...............much homework does he have? - He has a lot of homework.