单项选择题

The professor gave ______ instruction to the whole class so as to make every student understand how to conduct the experiment in the lab.

A．explicit
B．afflictive
C．authoritative
D．oblivious
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单项选择题
To the great disappointment of the public, the wanted in the murder case so far remains ______.
A．at large
B．in freedom
C．at ease
D．in prison
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The meeting was over ______ by the mayor to discuss the toll of crossing the bridges in Wuhan.
A．propelled
B．presumed
C．presided
D．pricked
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