单项选择题

Although buses in this district are scheduled to depart at a certain hour, they are often late.

A．planned
B．requested
C．obligated
D．loaded
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单项选择题
It is difficult to discern the sample that is on the slide unless the microscope is adjusted.
A．discard
B．arrange
C．determine
D．disagreement
单项选择题
Terry boasted that he could finish the project by himself in no time.
A．very quickly
B．on time
C．in time
D．at any time
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