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Some of the tourists ____ to visit Trang An Complex could not depart as scheduled

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"Just think, ______ 2 years' time, we'll be 20 both."

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The old students __________ one another in the school yard

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How often ______ you go to the cinema?

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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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The city council provides free tax guides to local businesses to guarantee ------- with federal taxation policies

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The U.S. higher education system offers unparalleled choice to international students in the types of institutions, academic and social environments, entry requirements, degree programs, and fields of study that are available

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Over the last forty years, psychologists _______ three methods which consistently improve memory for words

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 ____ dating involves couples going out together. It gives you the chance to see how your date interacts with other people

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Nobody’s got to stay late this evening, _____ ?

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My suit needed to be cleaned before the interview but didn't do that

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Soaring prices mean that many prospective buyers will reach the end of their _______ as they can no longer afford to buy their wanted properties

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Many people______ about the bad behavior of soccer fans in the town centre after the match

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He was clearly trying to ....... me but I refused to be provoked

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Well, it _____ but will it taste the same?

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The two men caught the virus _______ they were injected with the latest vaccine

We use a __________ to put the clothes in.

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The tide ...... very quickly here and you can soon find yourself stranded

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Few people can do creative work unless they are in the right _______ of mind

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One factor that ____ generation gaps is the accelerating rate of change in society. 

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Our associates searched the file cabinet for nearly an hour and finally found the missing receipts------- some travel documents