单项选择题

The major reason why Americans enjoy an abundant food supply is that the arable land at their disposal for food production is ______.

A．three times more the world average
B．three times as much the world average
C．three times the world average
D．the world average is three times
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单项选择题
______ ever so humble, there's no place like home.
A．It be
B．Be it
C．It was
D．Was it
单项选择题
______ all customs, no matter how sacrosanct, are essentially learned reactions appropriate perhaps only to the holders thereof is a basic assumption of anthropologists.
A．Nearly
B．It is nearly
C．That nearly
D．When nearly
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