单项选择题

Human beings have used tools for a long time, ______ they would not have been able to develop their intelligent so fast.

A．doubtlessly
B．therefore
C．otherwise
D．consequently
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单项选择题
The unexcused absences from class ______ Bubois from the course and the exam.
A．dispelled
B．dismissed
C．disqualified
D．disfavored
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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