单项选择题

you should not think that experts are（）right.

A. steadily
B. invariably
C. continuously
D. constantly

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单项选择题

During their first teacher training year, the students often visited schools for the（）of lessons

A. observation
B. investigation
C. inspection
D. examination

单项选择题

Peter was seen crying when he came out of the office. We can deduce that he must have been punished（）

A. confer
B. refer
C. prefer
D. infer

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