In most countries, the metric system has been _____ for all measurement.
D
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ExcelEnergyCorporation'snewonlinetrainingprogramhas_______(interact)featuresandforumdiscussionsfortrainees.
Undernocircumstances_____anythingthatwillbenefitourselvesbutatthesametimeharmtheinterestsof。
Anyvisitorstotheproductionfacilitiesmust____asecuritypassfromtheinformationdeskatthefrontentrance.