单项选择题

During their first teacher-training year, the students often visited local schools for the ______ of lessons.

A．investigation
B．observation
C．inspection
D．examination
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单项选择题
You might as well give in, because your position is ______.
A．infallible
B．intangible
C．untenable
D．immoral
单项选择题
The commission presented its report in January and this was broadly ______ in July of that year.
A．encased
B．encored
C．endued
D．endorsed
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