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At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly ____ to another subject.

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Prices are based _______ two people sharing a room

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He's been ______________ noises about taking us all to Rio, but we haven't heard anything definite.

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The manager asked her to _______with the complaint

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It is gravity ................. objects toward the earth. 

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"Parents today want their kids spending time on things that can bring them success, but (1)_________, we've stopped doing one thing that's actually been a proven predictor of success-and that's household chores," says Richard Rende, a (2)_________ psychologist in Paradise Valley, Ariz, and co-author of forthcoming book “Raising Can-Do Kids." Decades of studies show the benefits of chores- academically, emotionally and even professionally. Giving children household chores at an early age (3)_______ to build a lasting sense of mastery, responsibility and self-reliance, according to research by Marty Rossmann, professor emeritus at the University of Minnesota. In 2002, Dr. Rossmann analyzed data from a longitudinal study (4)_______ followed 84 children across four periods in their lives-in preschool, around ages 10 and 15, and in their mid-20s. She found that young adults who began chores at ages 3 and 4 were more likely to have good relationships with family and friends, to achieve academic and early career success and to be self-sufficient, as (5)_______ with those who didn't have chores or who started them as teens. Chores also teach children how to be empathetic and responsive to others' needs, notes psychologist Richard Weissbourd of the Harvard Graduate School of Education

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Many researchers claim that yoga practice and physical activities can improve people's ____ of life

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The flowers gave ........... a fragrant perfume

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Please don't shout at your children, ____?

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It is a _______ 

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The law requires that everyone______his car checked at least once a month 

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

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It's very pleasant ____ on the beach in summer

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____ will lead to the extinction of rare animals due to the loss of their habitats, and extreme floods and land erosion

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As the number of participants is confirmed ------- the schedule is set, the marketing division will design a poster for the conference

Choose below answer A, B, C, or D to complete the sentence. She is so ___________ that she doesn’t talk much to strangers.

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

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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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Old people are often looked_________ by their children when they get older

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Generic medications are just as ............., and much less expensive.

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My mom ________ for two days by the time I see her.