单项选择题

Human beings have used tools for a long time, ______ they would not have been able to develop their intelligence 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
Native demands are not just based on political grievances, ______. They also claim the land they owned.
A．too
B．though
C．however
D．either
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