The country’s chief exports are coal, cars and cotton goods, cars _____ the most important of these.
C
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The three men tried many times to sneak across the border into the neighboring country_____ by the police each time.
In international matches, prestige is so important that the only thing that matters is to avoid _____.
ProfessorJohnsonissaid_____somesignificantadvanceinhisresearchinthepastyears.
Under this____pressure some of the rocks even became liquid.