The relationship between corpulence and disease remains controversial, although statistics clearly ______reduced life expectancy______chronic obesity.

单项选择题School integration plans that involve busing between suburban and central city areas have contributed, according to a recent study, to______any future need for busing.

单项选择题Distinguished architecture requires the expenditure of large sums of money, even if it is by no means certain ______the expenditure of large sums of money______distinguished architecture.