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____ are trying to put a stop to the destruction of forests

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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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In making policy city, officials depend on over fifty citizen advisory boards and commissions for citizen input

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Say goodbye to Ann now. By the time you return, she ______ for New York.

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It was decided that I would ______________ my sister's place as the head of the company.

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Mrs Brown and Mrs Smith are talking about teaching teamwork skills to children.
- Mrs Brown: “Teamwork skills should be taught to children.”
- Mrs Smith: “_______ They are necessary for their future life.”

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The organization had broken no rules, but ____ had it acted responsibly

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The crime rate has continued to rise in American cities despite efforts on the part of both government and private citizens to curb ................

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The fictitious androids written about in the mid-1900s are becoming a reality with advances in the field of robotics. Japan and Korea have been pioneers in this field. They regularly compete to be the first. The focus on most reseachers is in (31) _____ life-like, attractive female androids. A Japanese research group led by Hiroshi Ishiguro created ther world’s first female android, which is called Actroid in 2003. The early model was limited so upgrades were made and the dramatic entertainment model was released in 2006. Actroids are covered with a silicone skin and have built-in sensors making them (32) _____ of reacting to humans, and they can also mimic many human behaviors. (33) _____, they can be programmed to speak in any language. The Korean android, EveR-2, released in 2006, was designed by a team from Kitech. They claim that she is more life-like than Actroids, and she can mimic emtions. She can also speak and move her lips to match her (34) _____. Future models are expected to have higher mobility and even be proficient in dancing. Research teams have also created male androids. One in particular is the Germinoid HI-I. Regardless of the competition, it’s clear that this technology will one day present us (35) _____ the dilemma of determining human from machine

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A recent agreement to share market data and statistics will be mutually ------- for the two publishers

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My profession allows me to both satisfy my own curiosity about the world and also to _______ some measure of international understanding

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The disease has sickened more than 38 million people worldwide and weakened the global economy

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He used to sell traditional handicrafts, __________?

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------- Michael is on a leave of absence this month, he might be willing to do some work from home

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Although at that time my knowledge of German was very poor, I ____ most of what they said about how to help people with mental disorders

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I have to go hand __________ my term paper now

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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

Choose the best answer to complete the senten. His name is Phong.He is ..................Viet Nam.

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She ………………… homework in the evenings.

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I was angry when you saw me because I ______ with my sister

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Whenever a problem ____________, we try to discuss frankly and find solutions as soon as possible