单项选择题

In English learning, a ______ cycle occurs when a student makes more errors after being scolded.

A．vertical
B．vicious
C．vivid
D．vigorous
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单项选择题
It is obvious that the sports games are no longer amateur affairs; they have become professionally______.
A．laid off
B．laid out
C．put off
D．put out
单项选择题
Isn't it ________ when you learn something you've never known before
A．cool
B．crazy
C．cold
D．cute
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