单项选择题

Not all universities in the U.S. offer a full ______ of programs leading from a BA degree to postgraduate education through the doctorate.

A．variety
B．category
C．load
D．range
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单项选择题
______ with enough instruments necessary for the experiment, these scientists are expecting to finish it ahead of time.
A．To be supplied
B．To supply
C．Supplying
D．Supplied
单项选择题
We don't expect that there should be such a great ______ for houses in the city.
A．demand
B．request
C．requirement
D．requisite
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