单项选择题

The policemen went into action______when they heard the alarm.

A. promptly
B. presently
C. quickly
D. directly
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单项选择题
Most electronic devices of this kind, ______ manufactured for such purposes, are tightly packed.
A. that are
B. as are
C. which is
D. it is
单项选择题
In this factory, suggestions often have to wait for months before they are fully _______.
A. admitted
B. acknowledged
C. absorbed
D. considered
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