单项选择题

Cattle raising is not necessarily a profitable business because

A．the demand is too low
B．the supply is too large
C．the cost is too high
D．the price is changeable
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单项选择题
Modern linguistics, as against traditional grammar, is ___________.
A．descriptive and synchronic
B．descriptive and diachronic
C．prescriptive and synchronic
D．prescriptive and diachronic
单项选择题
The Ivy League, the group, of old private north-eastern universities, include ______________. and some others.
A．Harvard, Yale, Cambridge
B．Harvard, Yale, Columbia
C．Harvard, Yale, Stanford
D．Harvard, Stanford, Columbia
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